Answer:
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Each cell expresses, or turns on, only a fraction of its genes at any given time. The rest of the genes are repressed, or turned off. The process of turning genes on and off is known as gene regulation.
Answer:
The correct order would be:
A vaccine introduces a weakened flu virus into the body.
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The immune system identifies antigens on the weakened flu virus.
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Antibodies are produced, which bind to the weakened flu virus and signal immune cells to destroy it.
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The actual flu virus enters the body, and lymphocytes recognize the antigens.
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Antibodies are quickly produced and allow the body to fight off the infection.
Vaccination or immunization is the process which helps in developing the immunity (adaptive) against a particular pathogen or microorganism.
It includes the administration of antigen, weakened or heat-killed microorganism (such as flu virus) into the patients body. Body's immune system produces naive B and T cells to eliminate the antigen.
This encounter enables the immune system to produce memory B and T cells against that particular pathogen.
In future, whenever the same antigen enters the body, the immune system gets activated quickly due to the presence of memory cells. It enables the body to produce more effective secondary response against the pathogen.
Answer:
The answer is meiosis
Explanation:
Mitosis results in daughter cells with the same genetic component as the parent. Hence, a drastic change in the environment may wipe out the entire population of organisms that only reproduce by mitosis.
A. OO
B. AB
C. AO or BO
D. O, BO, BO or O, AO, AO
E. no the baby was not switched.
- The genes that determine a person's ABO blood types have three alleles, as opposed to the majority of human qualities having just two alleles (A, B, O).
- One allele is inherited from each of these numerous alleles, which are transferred from parent to offspring.
- For human ABO blood types, there are six potential genotypes (genetic make-up of inherited alleles) and four phenotypes (expressed physical trait).
- The O allele is subordinate to the A and B alleles.
- The genotype is homozygous recessive and the blood type is O when both inherited alleles are O.
- The genotype is heterozygous and the blood type is AB when one of the inherited alleles is A and the other is B.
<h3>Types of blood group:</h3>
- <u>Type A</u>: There are two genotypes: AA and AO. Both the blood plasma's antibodies and the blood cells' antigens are A.
- <u>Type B</u>: There are two genotypes, BB and BO. The blood plasma contains A-type antibodies, while B-type antigens are found on blood cells.
- <u>Type AB</u>: The blood cell has antigens A and B on it. The blood plasma has no A or B antibodies.
- <u>Type O</u>: OO is the genotype. The blood cell has no A or B antigens. A and B antibodies are present in blood plasma.
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Answer:
The organism that can live deep beneath the earth surface despite intense pressure heat lack of water and sunlight might be Nematodes.
Explanation:
- Nematodes are able to cope extreme heat or extreme cold and dehydration. They have adopted by learning technique that allows them to survive. They can transform into a hardy form called the dauer stage.
- They can survive harsh conditions for longer durations at this stage. And again awaken themselves when conditions are favourable again.
- They can be found in hot springs, deserts, high up mountains and in the deepest oceans.