Answer:
Your answer is option A
Explanation: The gingival tissue in the oral cavity is the most important tissue of the oro-facial region for dental professionals to know and understand. The gingiva forms a protective covering over the other components of the periodontium and is well adapted to protect against mechanical insults.
What is the name of this tree?
Answer:
pond apple..is the name of that tree.
What is an advantage of nuclear power plant over coal power plant?
cost and lack of nuclear waste
Explanation:
T lymphocytes are responsible for ________ and maturation occurs in the ______ Group of answer choices the humoral immune response, bone marrow. the cellular immune response, thymus. producing antibodies, tonsils programming macrophages, bone marrow
Answer:
the cellular immune response, thymus.
Explanation:
T lymphocytes are cells which form a part of the immune system called the cellular immune response due to their responsive nature to foreign bodies.These cells originated from stem cells found in the bone marrow and they help to fight against any infections and cancerous cells in the body.
T lymphocytes are however also known to undergo their maturation in the thymus cells of the body.
You have isolated a mutant of Shigella dysenteriae bacteria that is resistant to kanamycin, and you want to find out what gene is responsible. Design a protocol using genetic selection to identify it
Answer:
It is possible to identify the function of a gene by site-specific targeted mutagenesis (i.e., by using a reverse genetics approach).
Explanation:
Targeted mutagenesis is an approach widely used in molecular biology in order to determine the functions of endogenous genes. Targeted mutagenesis is a type of genetic technique known as reverse genetics since it is a technology that enables to identify the function of a gene by modifying its product (i.e., its corresponding messenger RNA), thereby synthesizing non-functional proteins.
Moreover, it is also possible to identify the function of a gene by altering its expression, for example, by using small interfering RNAs (siRNAs) that inhibit protein translation through RNA interference (RNAi) mechanisms.
Earth is comprised of four systems, or spheres. Give one example of how a change in one of these spheres of the Earth can affect one or more of the other spheres.
Answer:
Earth is comprised of four circles: the lithosphere, hydrosphere, atmosphere, and biosphere. Changes in any piece of the Earth's framework influences every single other circle.
For example, storms structure in the air which bring precipitation and leads to the rain. Rain influences the hydrosphere by expanding the measure of water in a river, which influence the progression or flow of the stream. flowing rivers change the outside of the lithosphere. Plants and creatures in the biosphere rely upon water to endure.
Atrial and ventricular systole do not overlap under normal condition because of which of the following?
a) a delay of the action potential at the atrioventricular node
b) rapid conduction by the internodal pathway
c) rapid conduction by the bundle branches
d) the atriventricular node setting the pace of contractions
Answer:
) a delay of the action potential at the atrioventricular node
Explanation:
The reason for the short delay of 0.9s. is to ensure maximum contractions of the atrial to eject blood into the relaxed ventricles.(ventricular filing).
Thus when the atrial is contracting,the ventricles relax and vice versa.The short duration for the artrial contraction to occur for blood ejection into the relax ventricles guarantee that artial systole can not overlap the ventricle systole.
The artial must contract first for the ventricle fillings,and when this is completed,the atrioventricular valves closes,and blood flow through the aorta to the systemic circulation from the left ventricle and into the pulmonary circulation through the pulmonary vein.
This occurs simultaneously with both the R and L Artrial,and right and left Ventricles.
explain why all the offspring in the F1 generation were yellow instead of half being yellow and half green, or some other mix of the colors. Hint: Remember that Mendel coined the terms dominant and recessive.
Answer:
Yellow is a dominant trait.
Explanation:
There are dominant alleles and recessive ones. Say Y is a dominant allele and y is a recessive one. YY makes yellow, Yy makes yellow, and yy makes green. It takes just one dominant allele to make a phenotype (physical traits) express it. Look at the photo to help guide you. Using a punnet square you can find that both parents give a dominant allele and it only takes one.
Hope this helps
7. Which is a way that geological processes affect nutrient cycling?
People burn coal, oil, and natural gases.
o Weather controls when volcanoes erupt.
O People use ocean currents to predict rain.
O Weather moves gases in the atmosphere.
Answer:
Weather moves gases in the atmosphere.
Explanation:
Weather moves gases in the atmosphere. Therefore, option (A) is correct.
What is nutrient cycling?Nutrient cycling is the process by which nutrients are transformed, transported, and exchanged between different parts of an ecosystem. Nutrients are essential for the growth and survival of all living organisms, and they are constantly being recycled through various processes in the environment.
For example, plants absorb nutrients from the soil and water, and then animals consume these plants and incorporate the nutrients into their own bodies. When animals die, their bodies decompose, releasing the nutrients back into the soil or water, where they can be taken up by plants again. This continuous flow of nutrients between living organisms and the environment is known as nutrient cycling.
Nutrient cycling is important because it helps to maintain the balance of nutrients in an ecosystem and supports the functioning of the ecosystem as a whole. It is influenced by many factors, including geological processes, weather patterns, and the actions of living organisms.
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in the diagram below, what part of the digestive system is labeled A?
The question is incomplete as the diagram is missing, however, a digestive system diagram is attached related to question:
Answer:
The answer is - the salivary gland in the oral cavity.
Explanation:
The oral cavity called to the initial segment of the digestive system. Its essential capacity is to fill in as the passage of the nutritious tract and to start the digestion related procedure by salivation and propulsions of the wholesome bolus into the pharynx.
Portions of the mouth incorporate the lips, vestibule, mouth depression, gums, teeth, hard and delicate sense of taste, tongue and salivary organs
Do eukaryotic cells replicate their DNA in the cytoplasm and nuclus?
How the energy is transferred to animals that cannot Barnes energy directly from the sun
Answer:
Because animals cannot produce energy directly from the sun, they must eat plants or other animals that eat plants, and acquire energy, either directly or indirectly, from glucose
Explanation:
Which of the following would you use to inhibit the contraction of muscle in vitro as a control for an experiment you are conducting?
A. a motor protein ATPase inhibitor
B. a drug that increases T-tubule depolarization
C. a drug that increases sarcoplasm Ca2+ concentration
D. a Ca2+-ATPase inhibitor
E. All would inhibit muscle contraction.
Answer:
The correct answer is option A. a motor protein ATPase inhibitor.
Explanation:
Motor proteins are sub-atomic motors that utilize ATP hydrolysis to move along cytoskeletal filaments inside the cell. They satisfy numerous capacities inside the biological system, controlling the sliding of filaments for muscle contraction and intervening intracellular movement along biopolymer filament tracks.
The two globular head motor areas in heavy chains can change over the chemical energy of ATP hydrolysis into mechanical work to move along microtubules.
Thus, in vitro experiment inhibitor of the motor protein, ATPase will be a control.
Which of the following organisms have some strains that naturally carry a circular, 6.3-kb, 2-micron plasmid?
A. Escherichia coli
B. Saccharomyces cerevisiae
C. Agrobacterium tumefaciens
D. Drosophila melanogaster
Answer:
B
Explanation:
The correct answer for the organism with strains that naturally carry a circular, 6.3-kb, 2-micron plasmid would be Saccharomyces cerevisiae.
Most strains of Saccharomyces cerevisiae have been found to possess extrachromosomal elements in their nucleus. This extrachromosomal element is circular in nature and of about 2 microns and 6.3 kb without any known specific advantage or function.
Due to the simple nature of the yeast's plasmid, it has been a major source of study for the understanding and control of how replication works in eukaryotic organisms.
The correct option is B.
Which of the following is the muscle action that results in exhalation and causes the air pressure inside the lungs to be higher than outside the chest cavity?
a) Contraction of internal intercostals
b) Relaxation of the diaphragm
c) Contraction of the diaphragm
d) Relaxation of the external intercostals
Answer:
the correct option is: b) Relaxation of the diaphragm
Explanation:
During exhalation or exhalation ALL the muscles of the thorax cavities relax, unless it is a forced expiration there they will not be relaxed, but this is a voluntary and infrequent process.
The relaxation of the diaphragm is what generates an increase in intrapulmonary pressure and therefore it is forced to release its pressure by releasing air through the respiratory tube.
Although it is also valid to say that the internal intercostals are relaxed, since it is true! And it would also be considered as correct, but the diaphragm being a muscle of greater size and greater power generates a more significant effect on the exhalation, that is why it was decided to choose that as the correct option.
Answer:
Relaxation of the diaphragm
Explanation:
What is ovulation?
A. When an egg enters the fallopian tube
B. When an egg implants into the uterus
C. When an egg is produced in the ovary
D. When an egg is fertilized
Answer: A. When an egg enters the fallopian tube
Explanation:
Ovulation is when an egg is produced in the ovary. Therefore, the correct statement is option C.
What is ovulation?Ovulation is the process by which a mature egg is released from the ovary during the middle of the menstrual cycle. Ovaries contain thousands of immature eggs which then undergoes maturation and further develop.
When an immature egg reaches maturity, it releases into a single, fully developed egg that passes through fallopian tube towards the uterus. If the egg is fertilized by a sperm cell in uterus, it results in pregnancy.
If the egg is not fertilized, it will be expelled from the body during menstruation. This process is regulated by a hormones and feedback mechanisms, such as hypothalamus, pituitary gland, and ovaries. Several factors like stress, illness, and changes in body weight can affect ovulation and also the fertility.
Therefore, an egg is produced in the ovary during ovulation.
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Judging from their basal metabolic rates (an indicator of thyroid function), categorize the rats as hypothyroid (low thyroid levels; BMR below 1600), euthyroid ("good," or normal, thyroid levels; BMR = 1650-1750), or hyperthryoid (high thyroid levels; BMR above 1800). The normal rat is:_______.a. hypothyroid.b. euthyroid.c. hyperthyroid.
Answer:
Option b (Euthyroid) is the correct option.
Explanation:
The condition of obtaining everyday activities including its thyroid gland. Compare hyperactive (overactive) as well as hypothyroid (under-active) type thyroidsThe BMR (Basal metabolic rate) has always been regulated by the hypophyseal or otherwise thyroid glands, thyroxine significantly reduces metabolism.Its normal rate will be:
⇒ [tex]1673 - 1735 \ ml / O_{2}/ kg/ hr[/tex]
The other choices have no relation with the particular situation. So the argument presented however is the right one.
Which of Newton's laws of motion is the "action-reaction" law? A. first B. second C. third pls help i really need help asap
[tex] \large \longrightarrow \mid \mathbb{ \bf\pink{ANSWER}} \mid \longleftarrow[/tex]
Newton's 3rd law of motion is the " action - reaction " law .
This 3rd law states that ;
If a body A applies a force on body B then body B also applies force on body A which is equal in magnitude and opposite in direction .
In simple terms it is stated as ;
For every action there is an equivalent opposite reaction .
This is represented as ;
[tex]\tt{ {F}_{AB} = - {F}_{BA} }[/tex]
Example :-
When a birds flys in the air it pushes the air with it's wings downwards ( action ) . Similarly, the air pushes the bird upwards ( reaction ) .
What are two main abiotic factors that affect organisms in marine ecosystems? A. Oxygen level and water temperature B. Predators and competition C. Salinity and water temperature D. Predators and food availability
Answer:
dear user the answer is option A.oxygen level and water temperature and C.salinity and water temperature.
hope this helps
if it's useful to u plz thank and try to mark as brainliest
Answer:
It would be A
Explanation:
ASAP Which of the following is true about DNA in a prokaryotic cell? A. Wound tightly in the nucleus. B. Connected to protein that help it condense. C. It is coiled into a genophore, but not inside a nucleus. D. Made of only a single strand instead of double.
Answer:
C. It is coiled into a genophore, but not inside a nucleus.
Hope this helps.
what is gamete A. Two chromosomes that are identical B. two sets of sister chromatids C. a diploid cell that split during meiosis D. a sperm or egg produced by meiosis
Answer:
A
Explanation:
Answer:
D
Explanation:
a sperm or egg produced by meiosis
human infection of Toxoplasma is initiated in all the following ways except : 1. accidental ingestion of rodent feces 2.ingestion of contaminated undercooked meatform cattle, pigs, or sheep 3.ransplacental infection 4. Transplacental infection 5.Transfusion of contaminated blood
Answer:
1. accidental ingestion of rodent feces
Explanation:
Toxoplasma comes from infection with the Toxoplasma gondii parasite, which is a parasite found in cat feces.
Hope this helps.
What’s one example of a real-world problem which you might use knowledge from biological anthropology to help solve?
Answer:
Biological anthropology shows that cultural contexts are useful to explain human evolution.
Explanation:
Biological anthropology is a research area focused on the study of biological and behavioral determinants associated with human evolution. Biological anthropology enables us to trace the evolutionary origins of hominids and primates in general. Moreover, this discipline also sheds light on how different environments act on the mechanism of natural selection and thus shape human behavior. However, biological anthropology should not be considered to be part of social Darwinism used to apply Darwin's ideas to social policies.
A cell has a defect in its receptor for growth factors, preventing growth factors from attaching to and signalling the cell. Based on this, which prediction below is most likely?
A. The cell will remain dormant in GO phase.
B. The cell will grow uncontrollably and continue to divide as long as it has food.
C. The cell will replicate its DNA but be unable to begin mitosis.
D. The cell will begin DNA replication but will be unable to complete S phase.
Answer:
Option B
Explanation:
B. The cell will grow uncontrollably and continue to divide as long as it has food.
Cell growth is theeoretically stimulated by the binding of growth factors to their receptors using signaling pathways.
These pathways are regulated by proteins which are encoded for in the genes.
The gene that controls the regulation of these pathway when mutated produce malfunctioning signaling protein thus not allow for regulations of the cell cycle causing uncontrollable cell division. These mutated genes are called oncogenes.
A hypothesis is a(n) ______________, while a theory is a(n) ______________.
Answer
this is a little vague. for hypthesis, you could use guess, assumption, or conjecture. for theory, you could use prinicple or well-supported idea.
Explanation:
A certain red-flowered plant is self-fertilized. The progeny are 131 white-flowered plants and 169 red-flowered plants. Give a genetic explanation for these observations.
Answer:
Ratio of red flowers: white flowers = 169: 131 = 9: 7 as given in the question. It is clear that the color is possible only by at least 2 genes.
Let assume genes are A and B.
Now the cross AaBb (Red) x AaBb (Red)
Gametes ----------> AB Ab aB ab AB Ab aB ab
AB Ab aB ab
AB AABB (Red) AABb (Red) AaBB (Red) AaBb (Red)
Ab AABb (Red) AAbb (White) AaBb (Red) Aabb (White)
aB AaBB (Red) AaBb (Red) aaBB (White) aaBb (White)
ab AaBb (Red) Aabb (White) aaBb (White) aabb (White)
The ratio of Red flowers: White flowers is 9:7
The red color flower is produced when both the alleles of genes are dominant. if any of the alleles of genes is recessive, it will produce the white color flower. This is one of example complementary gene interaction where the presence of both genes in the dominant form complements each other to produce red color flowers.
The lock-and-key mechanism refers to a) the complementary shapes of an enzyme and a substrate. b) the attractive forces between an enzyme and a substrate. c) the ability of an enzyme to lower the activation energy of a reaction. d) the ability of an enzyme to “unlock” the products of a reaction.
Answer:
A. The complementary shapes of an enzyme and a substrate
Explanation:
The Lock-and-Key model was made to show how an enzyme's active zone fits a substrate and how they bond together. It correlates just like a lock and a key; you have to have the correct-shaped key in order to open a lock. Same process of thought with the enzymes; you must have the same shape for both in order to bind together,
Answer:
d
Explanation:
During the early stages of meiosis, two chromosomes in a homologous pair may exchane
segments, producing genetic variation in sex cells. This process of exchange is called
Select one:
a. crossing over
b. nondisjunction
c. transcription
O d. genetic shuffling
Check
Answer:
The answer is option A.
crossing over
Hope this helps you
Which of the following processes is/are example(s) of diffusion and/or osmosis that occur in your cells? Mark all that apply
a. O2/CO2 moving in/out of your blood cells as they flow through your lungs.
b. Na+ (sodium) & K+ (potassium) ions moving between the inside and outside of you nerve cells creating electrical impulses.
c. H2O moving in and out of all your cells to maintain homeostasis.
d. All of the above
e. None of the above
the answers are (a.) and (c.)
The examples of diffusion/osmosis that occurs in our cells are as follows:
O2/CO2 moving in/out of your blood cells as they flow through your lungsH2O moving in and out of all your cells to maintain homeostasis.DIFFUSION/OSMOSIS:
Diffusion is the process by which gaseous molecules move from a region of higher concentration to low concentration until they are evenly distributed. Osmosis, on the other hand, involves the movement of water from region where it is more concentrated to region where it is less concentrated via a semipermeable membrane.Both osmosis and diffusion are forms of passive transport, meaning that movement occurs down a concentration gradient. The following are examples of diffusion/osmosis that occur in human cells:O2/CO2 moving in/out of your blood cells as they flow through your lungsH2O moving in and out of all your cells to maintain homeostasis.Note that, option B is a form of active transport.
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An atom has a mass of 35 a neutron mass of 35 and an electron mass of 35. What is the estimated mass of the atom
Answer:
The estimated mass of the atom is 70
Explanation:
(35 protons + 35 neutrons)
It is often possible to predict the number of times a membrane protein crosses the membrane by determining how many short sequences of hydrophobic amino acids are present in the amino acid sequence of the protein. Choose the correct explanation. It is often possible to predict the number of times a membrane protein crosses the membrane by determining how many short sequences of hydrophobic amino acids are present in the amino acid sequence of the protein. Choose the correct explanation.
a. Sequences of hydrophilic amino acids are the segments of the protein that span the membrane.
b. Sequences of hydrophobic amino acids are the segments of the protein that span the membrane.
c. Sequences of hydrophobic amino acids are the segments of the protein that dissolve in the membrane.
d. Sequences of hydrophilic amino acids are the segments of the protein that dissolve in the membrane.
Sequences of hydrophobic amino acids are the segments of the protein that span the membrane. Thus option B is correct.
What are the levels of protein structure?
The Primary structure of proteins is the linear structure of amino acids formed by Covalent, peptide bonds to form primary structure of protein.
Secondary structure protein defined as the folded structures formed by hydrogen bonding among the amine and carboxyl group of the peptide chain and it finally form polypeptide then into protein.
These secondary structure present in two structure such as α – helix which form a polypeptide chain by hydrogen bonding and twisting into a right-handed screw with the -NH group of each amino acid residue.
The β – pleated sheet form of protein are stretched out ,laid side by side together by intermolecular hydrogen bonds.
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