Mucosal layer prevents the reabsorption of urine stored in the bladder.
What are the layers in the wall of urine ?
The wall of the urinary bladder has four layers. From the inside towards the outside they are: mucosa, submucosa, muscularis, and serosa or adventitia. The outside layer is either serosa or adventitia.
The inner lining of the urinary bladder is a mucous membrane of transitional epithelium that is continuous with that in the ureters. When the bladder is empty, the mucosa has numerous folds called rugae. The rugae and transitional epithelium allow the bladder to expand as it fills.
Urea, together with water and other waste substances, forms the urine as it passes through the nephrons and down the renal tubules of the kidney. Two ureters. These narrow tubes carry urine from the kidneys to the bladder.
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penetrance of the curled-leaf phenotype associated with the dominant l allele in a mustard weed is 40%. in a cross between an ll and an ll plant, what fraction of the offspring would you expect to have curled leaves?
There is a chance of 50% curled leaves with dominant allele.
A dominant trait is an inherited trait that manifests in a child if it is passed down from one parent to another through a dominant allele. Traits, commonly referred to as phenotypes, can include characteristics like eye colour, hair colour, immunity or susceptibility to specific diseases, as well as physical characteristics like freckles and dimples on the face. Each of the sexually reproducing species contains two pairs of chromosomes; humans have 23 pairs, making up a total of 46 chromosomes. The genotype of an organism is made up of the hundreds of genes on its chromosomes that produce the proteins that express and regulate all of its biochemical and physical characteristics.
The complete question is:
Penetrance of the curled-leaf phenotype associated with the dominant l allele in a mustard weed is 40%. in a cross between an ll and an ll plant, what fraction of the offspring would you expect to have curled leaves?
a) 20%
b) 25%
c) 50%
d) 75%
e) 100%
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true or false? fibroblasts can be found within the highlighted structure. true or false? fibroblasts can be found within the highlighted structure. false true
Yes, the statement is true, fibroblasts can be found within the highlighted structure.
The development of connective tissue, a fibrous cellular substance that connects and supports other tissues and organs in the body, is aided by a particular type of cell called a fibroblast. Collagen proteins, which are released by fibroblasts and support healthy skeletal systems in tissues. They are necessary for the wounds to heal. Simple skin biopsies can be used to separate a person's fibroblasts, which can subsequently be cultured in a lab for use in genetic and other investigations on that person. Fibroblast. In our lab, fibroblasts are frequently employed. Our skin and tendons include a specific type of connective tissue cell called a fibroblast. Furthermore, because it is a sort of cell that is simple to remove from patients and culture in the lab, it is crucial to our genetics study. A snap punch about the size of a pen tip is all that is required to puncture the skin.
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c) what is the probability in the f2 generation of a green stem offspring? use a punnett square(s) and quantitative data to explain your thinking. upload your punnett square(s).
The percentages of various genotypes that are anticipated to be present in the children of two parents may be calculated using a Punnett square.
The overall number of squares in each Punnett Square should be counted. You are then provided with the estimated total number of offspring. Subtract the (phenotype's prevalence in the population) from (the total number of offspring). To get your %, multiply the value given step 4 by 100. Punnett squares can be used to predict the proportions of phenotypes that known genotypes will produce in a cross's offspring. Based on other genotypes included in the cross, a missing genotype can be identified using a Punnett square. Because two heterozygous parents were crossbred, the F2 generation is much more varied. The genotype pattern of the F2 generation is as follows: 50% heterozygous, 25% homozygous recessive, and 25% homozygous dominant.
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organ failure associated with multiple organ dysfunction syndrome (mods) usually begins in which organ?
The MODS cascade is often started by the lung most frequently. Other often affected MODS components include the heart, brain, kidney, and liver.
Multiple Organ Dysfunction Syndrome (MODS) is the emergence of a possibly curable physiologic derangement encompassing two or more organ systems not included in the illness that led to ICU admission and occurring after a potentially fatal physiologic shock.
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what is a major difference between the extracellular matrix (ecm) of a plant cell and the ecm of an animal cell?
Plant ECM is primarily composed of proteins, whereas animal ECM is primarily composed of carbohydrates. Plant ECM is primarily composed of carbohydrates, whereas animal ECM is primarily composed of protein.
The main molecules that make up the animal extracellular matrix are: Structural proteins such as collagen and elastin, glycosaminoglycans, proteoglycans and glycoproteins. In plants, the cell wall is composed of carbohydrates (mainly cellulose) and glycoproteins. Both plants and animals have ECM . The cell wall of plant cells is a type of extracellular matrix. In animals, the ECM can surround cells either as fibrils that contact all sides of the cell or as a layer on which cells "sit" called the basement membrane. Animal fibers are made up of proteins. Plant fibers are composed of polysaccharides.
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For each genotype, indicate the state of the lactose operon if lactose is, or is not, provided in the medium. Partial diploids are achieved by additional lac genes carried by the F factor. Note: OC renders the operator insensitive to the repressor, I- indicates a defective repressor, and Is is a mutation that makes the repressor insensitive to lactose. Constitutive = always transcribed; Induced = up-regulated; Repressed = down-regulated.Genotype/medium Constitutive Induced RepressedIsOCZ+: No Lactose IsOCZ+: Lactose IsO+Z+: No Lactose IsO+Z+: Lactose
Lactose is present, but glucose is not: strong transcription of the lac operon occurs. Because the inducer (allolactose) is present, the lac repressor is released from the operator.
Because glucose is not present, cAMP levels are high, indicating that CAP is active and bound to the DNA. It's expressed only when lactose is present and glucose is absent.
in this case we conclude by these terms
I- = always on
Oc = always on
Z- = no lactose
Is = super repressor = always off, can only be inhibited by Oc
Examples:
W/ lactose & w/out lactose
F'-I+/I-O+Z- no & no
F'-Is/I-OcZ+. yes & yes
I +O+Z+/F' I-O+Z+. yes & no
I-OcZ-/F' I-Oc Z- no no
I-OcZ+/F' I-O+Z+. yes & yes
IsOcZ-/F' IsO+Z+. no & no
Without the regulator repressor, enzyme production will be constitutive;
enzyme production is still repressible.
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which of the following is untrue about ecosystems? group of answer choices an ecosystem is a dynamic complex of plants, animals, and microorganisms a temporary pond in a hollow tree ca be an ecosystem. ecosystems are being degraded rapidly. the interconnected components of an ecosystem are in a steady state. human beings are not considered to be part of the ecosystems.
A region's ecology can be defined as the sum of all its living and non-living components ecosystems. Biologic factors are the environment's live constituents. Plants, animals, and microorganisms are biotic factors.
Abiotic factors are the non-living elements of the environment. The term "abiotic factors" refers to things like rocks, water, soil, light, etc.The non-living elements of an ecosystem, such as soil, rivers, sunlight, air, and so on, are referred to as abiotic components.Together, these biotic and abiotic elements create a comprehensive ecosystem.The dynamic ecosystem's abiotic components play a significant role.
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which is the best evidence that a gene involved in antibiotic resistance in bacteria underwent lateral gene transfer?
The correct option (d) It has a phylogeny that is very different from those of most other genes.
The nonsexual transmission of genetic material across unrelated genomes is referred to as horizontal gene transfer, also known as lateral gene transfer. As a result, horizontal gene transfer entails the transmission of genes across species borders.
A mechanism known as lateral gene transfer (LGT) complicates the distribution of genes and phylogenies using a rRNA tree.
Because of this, a transfer event can be used to establish a relative age constraint between nodes in a phylogeny without the use of a molecular clock: the ancestor node of the donor lineage must precede the descendant node of the receiving lineage.
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Full Question : Which is the best evidence that a gene involved in antibiotic resistance in bacteria underwent lateral gene transfer?
a) The number of copies of the gene varies across lineages.
b) It shows many more nonsynonymous substitutions compared with synonymous ones.
c) It has accumulated many deleterious mutations within a lineage.
d) It has a phylogeny that is very different from those of most other genes.
e) It shows many more synonymous substitutions compared with nonsynonymous ones.
a coniferous forest characterized by trees such as spruce, fir, and pine and animals such as bears, deer, moose, beavers, and muskrats is known as
It is known for its coniferous forests, featuring trees such as spruce, fir, and pine, and animals such as bears, deer, elk, beavers, and muskrats. Taiga.
Taiga is a cold subarctic forest. The subarctic is the region of the Northern Hemisphere just south of the Arctic Circle. The taiga lies in between the tundra and to the north and also to the temperate forests to the south part. Taiga, commonly called boreal forest or snow forest in North America, is a biome characterized by coniferous forests, mainly composed of pine, spruce, and larch. The taiga, or boreal forest, is said to be the world's largest terrestrial biome. Taiga comes from the Russian word for swampy pine forest. Biome means an area with a high concentration of flora and fauna, which is why taiga forests are the largest terrestrial biomes in the world. The taiga has a cold climate with little precipitation (rain and snow). Taiga forests are believed to have existed 12,000 years ago.
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most mycoses are difficult to treat because: group of answer choices many fungi have developed resistance antifungal agents. treatment causes major disruption of the microbiota. fungicides are rapidly metabolized by the liver. fungicides are extremely expensive. fungi are biochemically similar to humans.
Mycoses because antifungal medications are difficult to create and some fungi are skilled at acquiring resistance to existing antifungal treatments, fungal infections can be tricky to treat even in healthy individuals.
According to the location, method of acquisition, and virulence type of the infection, fungi can be classed as infections. Fungal infections are categorized as superficial, cutaneous, subcutaneous, and deep depending on where they infect. In general, superficial mycoses do not cause irritation since they are restricted to the stratum corneum. The integument and its appendages, such as the hair and nails, are all affected by cutaneous infections. The stratum corneum or deeper layers of the epidermis may be affected by an infection. Skin inflammation is brought on by the organism or its byproducts. A variety of distinct infections known as subcutaneous mycoses are defined by an infection of the subcutaneous tissues, typically near the site of traumatic inoculation. The subcutaneous tissue frequently experiences an inflammatory response that extends into the epidermis. Lungs, abdominal organs, bones, and/or the central nervous system are all affected by deep mycoses. The gastrointestinal tract, the blood arteries, and the respiratory tract are the most typical entrance points.
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1) one major advantage of using arabidopsis thaliana as a model system for studies of plant form and function is its a) fast generation time. b) exceptionally large genome. c) large seeds. d) high tolerance to stress. e) high mutation rate.
Fast generation time is a key benefit of utilizing Arabidopsis thaliana as a model system for research on plant form and function.
It's correct to choose option a.
What justifies the usage of the model Arabidopsis thaliana?A popular model in plant genetic studies is the tiny annual weed Arabidopsis thaliana, which is a member of the mustard family. It has a tiny genome, a brief life cycle, and is straightforward to mutate.
What distinguishes Arabidopsis thaliana?To identify unique defense mechanisms of plant-pathogen resistance, Arabidopsis thaliana is employed as a model organism. These plants feature unique receptors on the surface of their cells, which enable the detection of pathogens and start processes to stop the spread of those infections.
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what are cyclins? what are kinases? how do cyclins and kinases work together to regulate the cell cycle?
Cyclins collaborate with an enzyme family known as the cyclin-dependent. An enzyme called a kinase catalyses the transfer of phosphate groups. s cyclins and kinases (CDKs), which are a class of serine/threonine kinases, control the cell cycle.
Cyclin is a family of proteins that regulates a cell's progression through the cell cycle by activating the group of enzymes necessary for the creation of the cell cycle or cyclin-dependent kinase enzymes. Cyclins work with a group of enzymes known as cyclin-dependent kinases to control the cell cycle's processes (Cdks). An inert Cdk becomes active when it binds to a cyclin, allowing it to function as an enzyme and change target proteins.
An enzyme known as a kinases is responsible for catalysing the transfer of phosphate groups from highly energetic, phosphate-donating molecules to certain substrates. Kinases are widely utilised in cells to regulate complex processes and send messages. Molecules' ability to interact with other molecules and to become more active or less active can both be affected by phosphorylation.
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3. Use the terms below to complete this paragraph:
NADPH, ATP, thylakoids, chlorophyll, chloroplasts, electrons
Light energy is absorbed by___found in the membranes of ___ which are saclike structures inside ___. The light energy dislodges___which are used to make___. Energy from this process is used to make___. The electrons and
energy are used to make sugars, which the plant stores or consumes for energy.
Light energy is absorbed chlorophyll found in the membranes of thylakoid which are saclike structures inside chloroplast. The light energy dislodges electrons which are used to make NADPH. Energy from this process is used to make ATP. The electrons and energy are used to make sugars, which the plant stores or consumes for energy.
What is ATP ?ATP or adenosine triphosphate which is required in the process of muscle contraction.
Myosin head contain ATP binding sites, ATP hydrolysis releases large amount of energy can be used in the formation of cross-bridge between Actin and Myosin.
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What is the main mode of reproduction in bacteria?
Answer:
Binary fission
Explanation:
Select ten flowers from the list to use in making a dichotomous key. If actual specimens are not available, color pictures or artificial flowers may be substituted. You may also want to use a microscope, magnifying glass, razor blade, tweezers, or dissecting needles. azalea marigold carnation orchid chrysanthemum pansy daisy peony four o'clock petunia gardenia poppy geranium rose hydrangea snapdragon iris sweet pea
Interpreting a dichotomous key is not too difficult. Simply do the following:- closely monitor your organism, own a biological vocabulary or be familiar with some technical phrases; adhere to the instructions.
The dichotomous key will direct you to the solution. In the illustration, we have a type of plant with irregularly shaped blue blooms that have five petals. The fruits are follicles or ripened flower ovaries.
The phrase "irregular flower" describes asymmetrical flowers with only one plane.
Follicle: A term used to describe the dry, dehiscent fruits that result from a single-carpel flower. When fully grown, they split along the ventral suture.
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A dichotomous key's interpretation is not too challenging. Simply follow the instructions, keep a careful eye on your organism, have a working knowledge of some technical terms or possess a biological vocabulary.
The answer will be revealed by using the dichotomous key. In the illustration, we see a particular kind of plant with five-petalled, atypically formed blue blossoms. Follicles or matured flower ovaries are the fruits.
One-planed asymmetrical flowers are referred to as "irregular blooms."
The term "follicle" refers to the dried, dehiscent fruits that emerge from a single-carpel flower. They divide at the ventral suture when completely grown.
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sexual dysfunctions are associated with all the phases of the human sexual response cycle identified by masters and johnson, except
Any stage of the sexual response cycle is susceptible to sexual dysfunction. You are unable to enjoy sexual activities to your delight.
The classic stages of the sexual response cycle are excitement, plateau, orgasm, and resolution. Both arousal and desire are a part of the sexual response's excitement phase. It's vital to understand that women don't always experience these phases sequentially.
Sexual dysfunctions are associated with all the phases of the human sexual response cycle
Four categories are commonly used to classify sexual dysfunction:
Disorders of desire: loss of sex drive.
Arousal disorders: the inability to get sexually thrilled physically.
abnormalities of orgasm: absence or delay (climax).
Pain disorders: discomfort during sex.
The conventional theories of sexual response have come under fire for having a male bias, or for being good at explaining male sexual experience but bad at explaining female sexual experience. These conventional models have been subjected to four main criticisms: The following assumptions are made: (1) that sexual desire is an automatic, spontaneous drive; (2) that arousal and desire are distinct states; (3) that the stages of arousal are sequential; and (4) that the psychological, relational, and environmental factors of sexual response are incidental to the physiological factors.
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when examining a phylogenetic tree, the tree provides information on shared ancestry but not necessarily on how organisms are similar or different
It's true, when examining a phylogenetic tree, the tree provides information on shared ancestry but not necessarily on how organisms are similar or different.
However, they may not always reveal how closely related or dissimilar species are. Phylogenetic connections reveal information about common ancestry. creatures or communities of creatures. Since it is impossible to go back in time to verify the links claimed by phylogenetic trees, scientists see them as historical hypotheses.
Regardless of the lengths of the branches, patterns of evolutionary descent convey the same information. The branching history of shared ancestry is the sole thing that a phylogenetic tree shows, unless otherwise stated. Even within the same creature, various genes might produce diverse phylogenetic trees. It is acknowledged that methodological difficulties might be the root of such disparities. On a phylogenetic tree, trace each taxon's ancestry backwards until all the lineages converge to discover the group's most recent common ancestor.
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the slide you viewed in this exercise was from a mammal, but not a human. how is the slide you viewed different from that of a human? what does this tell you about the mammal the sample originated from?
A male mammal has seminal vesicles and a prostate gland. A female mammal has a cervix, uterus, oviducts, and mammary gland.
The term "reproductive system" describes a system that aids in reproduction. Testes, seminal vesicles, the prostate, and the urethra are the male reproductive organs that aid in reproduction.
The ovaries, Fallopian tubes, uterus, and vulva in females are the reproductive organs that aid in the process.
These are the unique organs that females have that serve as a location for fertilization, function to nourish the growing fetus, and protect the growing offspring.
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Meiosis i is described as ______ division because it results in two daughter cells with half the number of chromosomes.
Meiosis I is described as reductional division because it results in two daughter cells with half the number of chromosomes.
Meiosis is a part of the sexual process because gametes (sperm and eggs) have one-half the number of chromosomes as diploid (2N) individuals. Meiosis has two divisions; the first is meiosis I, in which the number of cells doubles but the number of chromosomes does not. As a result, each cell has half as many chromosomes. Meiosis is also known as "reduction division" because it reduces the number of chromosomes to half the normal number so that when sperm and egg fusion occurs, the baby has the correct number.
Sister chromatids within the two daughter cells separate during meiosis II, resulting in the formation of four new haploid gametes. Meiosis II mechanics are similar to mitosis, with the exception that each dividing cell has only one set of homologous chromosomes. Meiosis II is the second division of meiosis in which each chromosome's chromatids are segregated equally into daughter cells. During the interphase that precedes meiosis II, no DNA replication occurs. Prophase II is the initial stage of meiosis II.
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what is a trochophore? what is a trochophore? a synapomorphy that defines lophotrochozoans a specialized filter-feeding structure the single opening in species with a blind gut a distinctive type of larva with a band of cilia submit
A band of cilia on the underside of the larva known as a trochophore gives it away.
Trochophores are spherical or pear-shaped, and their prototroch (a ring of tiny hairlike structures) gives them the ability to swim. An apical tuft of cilia, an ocellus, and a sensory plate are located above the prototroch (simple eye). The solenocyte, whose purpose appears to be to maintain adequate internal salt-water balance, and, in some species, one or two more ciliary rings, is located below the prototroch. Other structures below the prototroch include the mouth, stomach, anus, and other organs. Before metamorphosing to an adult form in some mollusks (such as gastropods and bivalves), the trochophore develops Trochophore-like organisms include rotifers and the larvae (sometimes referred to as trochophores) of invertebrates like phoronids and bryozoans.
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in the process of renal autoregulation a. the afferent arterioles dilate, increasing glomerular filtration rate b. the nephron loop reabsorbs more sodium and chloride ions c. the collecting tubule reabsorbs less water d. the efferent arterioles dilate, allowing blood to flow through the kidney faster
Afferent arterioles expand as a result of renal autoregulation, speeding up glomerular filtration rate.
what is renal autoregulation?
The pace of blood flow can be effectively controlled by the kidneys over a wide range of blood pressures. While you're unwinding or sleeping, your blood pressure will drop.
When you exercise, it will rise. The rate of filtration via the kidney won't vary much despite these modifications. This is a result of two independent internal autoregulatory processes, the myogenic mechanism and the tubulo-glomerular feedback mechanism.
JGA and a paracrine signalling system using ATP, adenosine, and nitric oxide are both part of the tubuloglomerular feedback mechanism (NO). Afferent arteriolar smooth muscle cells are stimulated by this mechanism to contract or relax. Recall that the afferent and efferent arterioles of the glomerulus are in close contact with the DCT.
In this section of the tubule, specialised macula densa cells react to variations in fluid flow and Na+ concentration. A higher osmolarity in the filtrate is caused by less time for NaCl to be reabsorbed in the PCT as GFR rises.
Single nonmotile cilia on macula densa cells are deflected by the increased fluid flow more strongly. Due to the higher flow rate within the DCT and the increased osmolarity of the producing urine, the macula densa cells are activated and respond by releasing ATP and adenosine (a metabolite of ATP).
Local paracrine substances, including ATP and adenosine, cause the myogenic juxtaglomerular cells of the afferent arteriole to contract, delaying blood flow and lowering GFR. In contrast, as GFR falls, less Na+ will be in the producing urine, and the majority of it will be reabsorbed before it reaches the macula densa .
This will lead to a decrease in ATP and adenosine, which will enable the afferent arteriole to widen and raise GFR. The afferent arteriole is stimulated to constrict by ATP and adenosine, but NO has the opposite effect, relaxing it.
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Most of the photosynthesis in plants takes place in specialized parenchyma cells called.
The parenchyma, or photosynthetic tissue, of leaves is known as mesophyll. of leaves. Chloroplasts are abundant in mesophyll parenchyma cells, which are typically grouped in one of two ways: palisade-like and soft
What is found inside mesophyll cells?Mesophyll parenchyma cells comprise
Chloroplasts, the organelles in charge of converting light energy into chemical energy, are present in mesophyll cells but not in epidermal cells. Palisade parenchyma and spongy parenchyma are the two distinct cell types that make up the mesophyll.
What exactly does the term "chemical energy" mean?chemical energy, Chemical compound bonds contain energy. Exothermic reactions are those in which chemical energy is released during the process, frequently in the form of heat.
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An sensory organ obtained from plants as well as some algae called a chloroplast is where photosynthesis occurs.
How does the chloroplast work?Plant development and crop productivity are supported by the energy that chloroplasts produce through photosynthetic and oxygen-release mechanisms. As a result, chloroplasts are in charge of producing active substances such amino acids, plant hormones, enzymes, vitamins, lipids, and metabolites through a process known as biosynthesis.
In the real world, what is a chloroplast?A component of a plant's cell called the chloroplast transforms solar energy into fuel that may be used by the plant (sugar). Chloroplasts are a component of the cells of other living things like algae.
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In 2003, a major federally funded project was completed. This project mapped the sequence of all the base pairs that make up human dna, and it has helped researchers understand drug interactions in the body. Which is most likely the name of this project? federal health project pharmacodynamics project human diagnostic project human genome project.
The Human Genome Project, which began in October 1990 and ended in April 2003, is best known for creating the first sequence of the human genome.
One of the greatest scientific achievements in history is the
Human Genome Project. An multinational team of scientists undertook the project as a biological odyssey to thoroughly examine the entire DNA (also known as a genome) of a particular group of organisms. The Human Genome Project, which began in October 1990 and ended in April 2003, is best known for producing the first sequence of the human genome. This accomplishment provided crucial knowledge about the human genetic code and has since sped up research into human biology and enhanced medical care.
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a junk yard located across from a subdivision would cause: select one: a. functional obsolescence b. environmental obsolescence c. physical obsolescence d. non-conforming obsolescence
The Correct Answer is Option B
B environmental obsolescence
What is Environmental obsolescence?
External obsolescence is a value decline brought on by an unfavorable external event. External obsolescence includes locational obsolescence, external obsolescence, economic obsolescence, and environmental obsolescence. In most cases, external obsolescence cannot be reversed.
Examples of external obsolescence include the following:
•Values will drop if a landfill or industrial facility is built near to a residential area (locational obsolescence).
•Values will drop if a government-subsidized apartment building is built near to a subdivision of homes (locational obsolescence).
•A rise in interest rates will result in falling values (economic obsolescence)
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What is the space within the Haversian system where the
osteocyte is found?
A lamellae
B Haversian canal
C periosteum
D
lacunae
Answer:
Osteocytes ( are located within lacunae surrounded by mineralized bone matrix so the answer is D
Answer: D
Explanation:
The motor neuron and all the myofibers it innervates is referred to as a ____________ . Every time a motor neuron sends a nerve impulse to a skeletal muscle fiber, the muscle fiber will ____________ .
Motor Unit, be stimulated to contract
The term "motor unit" refers to the motor neuron as well as all of the myofibers it innervates. Skeletal muscle fibers contract each moment a motor neuron transmits a nerve signal to them.
The connection between a motor neuron as well as a collection of muscle fibers is known as the motor unit. Multiple motor units make up a single muscle. Each of them is made up of just a little portion of the total muscle mass, which means that this portion will contract. The presynaptic membrane receives an action potential from of the central nervous system. Acetylcholine , a neurotransmitter, is released into the synaptic region as a result of an action potential. After passing through the synaptic gap and arriving at the postsynaptic membrane, the neurotransmitter binds towards its receptors on skeletal muscle fiber, prompting ion channels to open. The connection between a motor neuron as well as a muscle is known as the motor unit.
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a dna sequence is shown.ctg - gag - catwhich sequences show the result of an insertion mutation in the dna? check all that apply.ctg - ggc - atctg - tat - catttg - gag - catcta - gga - gca - tctg - gag - tcg - at
A DNA sequence is a CTA - GGA - GCA - T and CTG - GAG - TCG - AT show the result of an insertion mutation in the DNA.
In terms of genomics, insertion is a form of mutation in which one or more nucleotides are inserted into a DNA sequence. Any number of nucleotides can be added during an insertion, ranging from one nucleotide to an entire chromosome (see the below picture).
Insertion refers to the addition of several nucleotides in error to the genome, most frequently while DNA replication is taking place. This quantity can range from one nucleotide to dozens or even millions of them. An insertion's impact differs as well. Others, even single nucleotide insertions, might completely impair a gene's ability to function and result in a pathogenic variant linked to a hereditary disease. Some mutations may have no effect at all.
The four nucleotides that makeup DNA are adenine (A), thymine (T), guanine (G), and cytosine (C) (C). The two DNA strands are connected by base pairs, which are formed when the nucleotides (A with T and G with C) bind to one another. Genes are compact DNA molecules that contain particular genetic information. See the structure of DNA and Nucleotide in below pictures
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Which statement best describes the function of tubular reabsorption?
A) Tubular reabsorption moves blood plasma through the filtration membrane of the glomerular capillaries.
B) Tubular reabsorption removes toxins from the blood that was not filtered.
C) Tubular reabsorption moves items from the peritubular capillary blood into the filtrate.
D) Tubular reabsorption reclaims items from filtrate and returns them to the blood.
The statement that best describes the function of tubular reabsorption is as follows: tubular reabsorption reclaims items from filtrate and returns them to the blood (option D).
What is tubular reabsorption?Tubular reabsorption is the process that moves solutes and water out of the filtrate and back into the bloodstream
This process is known as reabsorption, because it is the second time substances have been absorbed; the first time being when they were absorbed into the bloodstream from the digestive tract after a meal.
Tubular reabsorption allows the body to reclaim any needed materials from the kidneys after glomerular filtration, which is the process of forcing water, salts, urea and glucose from the blood through a membrane via pressure.
Therefore, it can be said that option D is the best description of the function of tubular reabsorption.
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In response to chemical signals, prokaryotes can do which of the following?
A) turn off translation of their mRNA
B) alter the level of production of various enzymes
C) increase the number and responsiveness of their ribosomes
D) inactivate their mRNA molecules
E) alter the sequence of amino acids in certain proteins
In response to chemical signals, prokaryotes can alter the level of production of various enzymes
What are prokaryotes?
Any organism without internal membranes is referred to as a prokaryote, usually written procaryote. These organisms lack a defined nucleus and other organelles. One of the most well-known prokaryotic species is bacteria. Prokaryotes differ from eukaryotes by not having internal membranes. Both a distinct nucleus and membrane-bound cell organelles are absent in prokaryotic cells. Blue-green algae, bacteria, and mycoplasma are prokaryotes. Bacteria are the most prevalent and fastest-growing prokaryotes. Prokaryotes are single-celled organisms that belong to the domains of Bacteria and Archaea only. Pro means before and Kary means nucleus. Eukaryotes, which are made up of eukaryotic cells, include animals, plants, fungi, and protists.
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Put the potential offspring genotypes in order from highest expected frequency to lowest expected frequency for a cross in which both parents have the RrTt genotype.
a. RrTt rrTt RRtt
b. RrTt RRtt rrTt
c. rrTt RRtt RrTt
a. RrTt rrTt RRtt. Mendel's theory is based on the hybrid cross trait. Take the example of a dihybrid cross, which occurs when two doubly heterozygous individuals are bred together.
Using this Punnett square as a guide, next:
Dihybrid cross: where A stands for the dominant white seed characteristic, B stands for the recessive wrinkled seed trait, and a stands for the recessive yellow seed trait. B stands for the dominant smooth seed trait.
These are the dihybrid cross-ratios:
Dihybrid cross's genotypic ratio is 1: 2: 1: 2: 4: 2: 1: 2: 1.
9:3:3:1 would be the phenotypic ratio.
One can color the Punnett squares with comparable allele combinations to calculate the genotypic ratios, and then count the number of Punnett squares with the same color to determine the genetic ratios.
Take a look at the illustration below for a visual illustration: a dihybrid hybridization of pea plants that takes into account two features
Y, for green seeds against y, for yellow seeds (the dominating seed color characteristic) (recessive seed color trait)
R, for wrinkled seeds against r, for round seeds (the dominating seed texture feature) (recessive seed texture trait).
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