Answer:
Prokaryotic cells have free floating DNA
Answer:
B. prokaryotic
Explanation:
The prokaryotic cells has free-floating DNA. The option (B) is the answer.
PLEASE HELP ANSWER THIS
Answer:
I think the answer is A but I also feel like it would be C but I go with A because you can see that it is two or more elements in A but not so much in C
Please help it’s biology!!!!!!
Answer:
25%
Explanation:
If a parent is heterozygous, it has 2 difterent alleles. Both parents are heterozygous for blood type A, so the genotype is AO. A masks the O because A is dominant over O, so A is the blood type.
Create a punnett square to find possible offspring
AA = Blood type A
AO = Blood type A
OO = Blood type O
There is 1 child out of 4 that have blood type O. So to find the percentage divide 1 and 4 and multiply by 100.
1÷4×100 = 25
Which of the following is an
organelle?
A. a brain
B. a cell
C. lungs
D. a nucleus
According to the theory of natural selection some individuals in a population survive while others die he proposed that survival is due to the
Answer:
Possession of inherited adaptations that maximize fitness.
Explanation:
Basically ones that are best adapted for their environment. (I'm assuming "he" is Darwin?)
What animal barks like a dog but flys like a Eagle and looks like a rat
Answer:
Uhhh no animal that is real has that description…
Explanation:
Answer:
i think theres no animal like that
Explanation:
The vesicles involved in endo/exocytosis are surrounded by a phospholipid membrane.
A. True
B. False
Answer:
A. True
Explanation:
The vesicle travels to the cell membrane. The vesicle fuses to the plasma membrane, during which the two bilayers merge. The vesicle's contents are released into the extracellular space. The vesicle either fuses with or separates from the cell membrane.
Which high school courses would be beneficial for a career in parasitology? O anatomy and physiology botany and animal biology o technology and zoology biology and biochemistry
I believe it's biology and biochemistry.
different types of cells in the body have different organells depending on their main function. Considering this which type of cells would have the most mitochondria?
A. Red blood cells
B. Bone cells
C. Muscle cells
D. Nerve cells
E. Skin cells
Choose two different types of cell and explain how they are adapted for the job they do in your body
Answer: Neurons, which transmits information, have dendrites and axons to transmit the signals. Cardiomyocytes, capable of spontaneous contraction due to the ramifications and tight junctions between cells.
Explanation:
Neuron: Principal component cell of the nervous system, which receives, processes and transmits information through electrical and chemical signals thanks to the electrical excitability of its plasma membrane. So they are specialized cells in the reception of stimuli and conduction of the nerve impulse, in the form of an action potential, between them through connections called synapses, or with other cell types such as, for example, the muscle fibers of the motor plate. So neurons have the ability to communicate accurately, rapidly, and over long distances with other cells, whether nerve, muscle, or glandular. Neurons have morphological characteristics that support their functions:
Dendrites: Short extensions consisting of cytoplasmic projections enveloped by a plasma membrane without a myelin sheath, that transmit impulses to the cell soma. The nerve impulse travels through the neuron, and when it reaches the dendrites, it jumps to the next neuron through the synapse (connection between cells), which occurs through the exchange of chemical substances called neurotransmitters. It also has many microtubules and few neurofilaments, both arranged in parallel bundles, many mitochondria, Nissl clumps (composed of free ribosomes attached to the rough reticulum) and smooth endoplasmic reticulum.Axons: Long extension surrounded by a membrane called axolemma, which conducts impulses from the soma to another neuron or target organ. Many axons are covered with a special insulating substance called myelin, which helps them to transmit nerve impulses quickly. Near its end, the axon divides into many branches and develops bulbous structures known as axon terminals. These axon terminals form connections with target cells.The cell bodies of some neurons from the Peripheral Nervous System (PNS), such as the motor neurons that control skeletal muscles, are located in the Central Nervous System (CNS). The axons from this motor neurons run from the CNS to the muscles they connect with. The cell bodies of other PNS neurons, such as sensory neurons that provide information, for example about touch or temperature, are located outside the CNS, where they are grouped in clusters known as ganglia. Axons of peripheral neurons that travel a common pathway bundle together and form nerves.
Neurons also consists of a central nucleus and a perikaryon that contains the typical organelles of an eukaryotic cell.
Cell nucleus: Contains one or two prominent nucleoli, and a dispersed chromatin, which indicates a high transcriptional activity.The nuclear envelope, with a multitude of nuclear pores, has a highly developed nuclear lamina. Perikarion : The most notable organelle, is the Nissl substance and such abundance in protein synthesis is due to the high biosynthetic rate. The Golgi apparatus is a highly developed system of flattened, small agranular vesicles and it is the region where the products of the Nissl substance enable further synthesis. There are also lysosomes and mitochondria , a cytoskeleton rich in microtubules and intermediate filaments.
Cardiomyocytes: Cardiac muscle cells that represents the contractile unit of the myocardiom, capable of spontaneous contraction since they show specialization in excitation and conduction of action potentials. The characteristic ramifications and tight junctions between these cells form a solid network of myocardial fibers, which determines the cardiac pump function and the cellular electrical conduction system that allows this pump to function. They are uninucleated cells with a large nucleus located in the center of the cell cytoplasm and they show transverse striations, with dark bands corresponding to the overlapping of actin and myosin filaments in their cytoskeleton, and with light bands corresponding only to actin filaments. Cardiomyocytes have morphological characteristics that support their functions:
Sarcoplasmic reticulum: Not well developed and distributed irregularly among the myofibrils, which appear distinctly separated.Mitochondria: Small and extremely numerous, packed and regularly distributed, dividing the cardiac cells into very obvious myofibrils. Cardiac muscle cells have very little glycogen and therefore cannot obtain much energy from glycolysis. This means that most of their energy comes from oxidative phosphorylation, with high oxygen consumption. Cytoplasm: Occupied by longitudinally arranged myofibrils with a striated pattern. Intercalary discs: Join cardiomyocytes, which appear as dark bands in histological preparations, and which are a set of junctional complexes where desmosomes and adherens junctions can be found. There are also cleavage junctions that allow contractile synchronization as they communicate cytoplasms of neighboring cells directly.Epidermic cells and red blood cells are two types of specialized cells. These mature cell types are developed by cell differentiation.
Cell differentiation refers to the differential gene expression that leads to the development of different types of cells which are specialized to perform specific functions.For example, hematopoietic stem cells express the hemoglobin gene to develop specialized red blood cells, which are specialized to transport oxygen to all cells of the body.Moreover, epidermic cells are specialized to provide mechanical strength and protection.In conclusion, epidermic cells and red blood cells are two types of specialized cells. These mature cell types are developed by cell differentiation.
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L 4.5.2 Test (CST): Computer-Scored Unit Test
Question 20 of 25
What is a fixed allele?
A. An allele that is found on many genes
B. An allele present in all members of a population
Ο Ο
C. An allele that formed by adaptive radiation
O D. An allele that mutates with each generation
SUBMIT
PLEASE HELP
Answer:
The correct answer is - B. An allele present in all members of a population.
Explanation:
A homzygous variant or allele for all the members of a particular gene is a fixed gene and is the only variant that presents in all the population for that gene.
It takes place when there is all other alleles become extinct and only one remains. The allele frequency of this allele is always 1.00 in the population which means only one allele is present on the locus.
what does a root hair cell do
Answer:
Root hair cells (black arrow pointing at one of the root hair cells) are single tubular root cells. Their distinctive lateral elongation increases the surface of exchange between the plant's root system and the soil. The main function of root hairs is the uptake of water and nutrients from the rhizosphere.
definicion de cromatidas
Which class of point mutation produces a product with the same amino acid sequence as the wild-type polypeptide?
Answer:
The correct answer is - silent.
Explanation:
Silent mutation is a point mutation that takes place by a single change in a single base nucleotide of nucleic acid and it may or may not change the aminoacid sequence as the wild type protein.
This does not result in any phenotypic or functional change in the protein of the organism. It is a class of point mutation. This change can be substitution in base.
I WILL GIVE BRAINLIST
Answer:
A
Explanation:
The animal kingdom is divided into 31 Phyla and 101 Classes.
Which type of cell store's its DNA in the nucleus?
A. prokaryotic
B. eukaryotic
Answer:
Hey mate......
Explanation:
This is ur answer.....
A. EukaryoticEukaryotes usually have other membrane-bound organelles in addition to the nucleus, while prokaryotes don't.
Hope it helps!
Brainliest pls!
Follow me! :)
Answer:
Explanation:
answer is eukaryotic because proparyotic cell does not have nucleus.
Pls answer this question 7
Answer:
E
Explanation:
E makes the most sense because it is the only answer that talks about making energy and using that energy to move, which is what the bird is doing.
Which of the following types of micro organisms are the most beneficial to other organisms in an ecosystem
Answer:
Bacteria.............
To melt the ice during the winter season, road crews often put sand and salt solutions on the roadways to help melt the snow and ice. The plants that live close to the road often die or wilt after this procedure. Using your knowledge of osmosis and plant structures, which type of solution would cause this to happen to plant cells? Group of answer choices
Answer:
The missing answer choices are:
a. hypotonic
b. isotonic
c. osmosis
d. hypertonic
The correct option is d. hypertonic
Explanation:
A hypertonic solution has a higher concentration of solutes than the concentration of solutes present inside the plant. As there is a difference in concentration between the inside and the outside of the plant, the plant loses water in an attempt to balance the difference. As a result, there is an excessive loss of water that dehydrates the plant and kills it.
I need help with this gizmo
A possible hypothesis for this situation is that tank 1 contains denitrifying bacteria, tank 2 contains nitrite nitrifying bacteria, and tank 3 contains ammonia nitrifying bacteria.
What is a hypothesis?A hypothesis, which is a common term used in experiments refers to a possible explanation for the results or phenomenon observed. In this case, a hypothesis needs to focus on the type of bacteria that are present in each of the tanks.
This means that to write a hypothesis we need to relate the type of bacteria to each of the tanks.
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Interferons Interferons reduce macrophage chemotaxis to the infection. interfere with viral replication. prevent viruses from entering a cell. bind to viruses and destroy them. prevent viruses from leaving a cell.
Answer:
interfere with viral replication
Explanation:
Interferons (IFNs) are proteinous molecules, which are part of the innate immune system of our body. Interferons are produced in response to viral infections and they often specialize in preventing the virus pathogen from replicating or multiplying in the host cell.
As their name implies, INTERFERONS interfere with the replication of viral pathogens, hence, preventing the virus from further invading the host cell. This is done at the innate immunity level.
Could someone please tell me if this is mold or not? I think it is but honestly I know nothing about that.
Answer:
It would be Penicillium or Aspergillus, if it is even mold. They are some of the fastest growing molds (usually within 24 to 48 hours) and require very little moisture for their colonies to develop. I haven't ever seen mold
It's usually not possible for you to remove it from wood, but you are going to want to call someone to get rid of it. You don't know what exactly it is and buying fungicide may help.
Happy(and safe) learning!
--Applepi101 :)
I need this in an hour
PLEASE HELP FAST
NO LINKS OR TROLL ANSWERS I WILL REP0RT
brown eyes because baby’s are most likely to have brown eyes when there born.
Which type of cell DOES have membrane-bound organelles?
A. eukaryotic
B. prokaryotic
when two heterozygous individual are crossed,the proportion of the offspring that are true breeding for dominant trait is
Answer:
75%
Explanation:
If you drew a Punnett Square, you will see that the possible outcomes would be AA, Aa, aA, and aa. Three out of the four would exhibit the dominant trait.
HELP THIS IS TIMED!!!
Which courses should Don take in high school if he wants to pursue a degree and career in molecular biology? O anatomy and neurobiology O immunology and genetics O history and communications O physics and trigonometry
Answer:
anatomy and neurobiology
Explanation:
Molecular Biology is the field of biology that studies the composition, structure and interactions of cellular molecules – such as nucleic acids and proteins – that carry out the biological processes essential for the cell's functions and maintenance.
Successful molecular biologists have an excellent understanding of subjects such as cell physiology, chemistry, genetics, and physics.
A neuroscientist (or neurobiologist) is a scientist who has specialised knowledge in the field of neuroscience, the branch of biology that deals with the physiology, biochemistry, psychology, anatomy and molecular biology of neurons, neural circuits, and glial cells and especially their behavioral, biological, and psychological aspect in health and disease.
Canidae defines which taxon for both gray wolves and dogs?
A.kingdom
B.genus
C.phylum
D.family
what animal is the descendant of Gilmoreosaurus
Answer:
Dinosaurs!
Explanation:
stions
Describe what a muscle fiber looks like and what it
can do.
Answer:
Smooth muscle fibers have an oblong shape, much like a football. They’re also thousands of times shorter than skeletal muscle fibers. Similar to skeletal muscles, cardiac muscles are striated. They’re only found in the heart. Cardiac muscle fibers have some unique features.
Explanation:
Genetic variation _____. Group of answer choices is created by the direct action of natural selection always arises in response to changes in the environment must be present in a population before natural selection can act upon the population tends to be reduced when diploid organisms produce gametes
Answer:
It must be present in a population before natural selection can act upon the population.
Explanation:
Genetic variation refers to the variations that exists in the DNA of the individuals. These variations are caused mainly by mutation and genetic recombination of the DNA. It helps in the process of evolution. Genetic variations helps in building the mechanisms of change that helps in the process of evolution. Genetic variation is caused highly because of process of sexual reproduction. The offspring exhibit various genetic variation.