Answer:
Genetic drift is simply a change in the frequency of alleles in a population.
Like shown in the comic A, there are different genes present on chromosomes. All of these genes are made up of a pair of alleles. These alleles determine the genotype and the resulting phenotype of an organism.
If none of the alleles is favored by the environment, then a population will have equal no.of all the variant forms of a trait. Like shown in the comic B, both the green and the grey animals are favored equally.
But if natural selection occurs and one form of the allele variant is favored, then a genetic drift will occur. Most of the organisms will have the alleles which are favored by the environment. Like shown in Comic C, where the grey alleles are favored more than the green alleles.
<u>Answer:</u>
Mitochondria, the organelles involved in cellular respiration, can also generate chemicals called reactive oxygen species (ROSs). ROSs can damage mitochondria. Damaged mitochondria generate more ROSs than healthy mitochondria. This is an example of a positive feedback mechanism
The reactive oxygen species that are given out by the mitochondria during cellular respiration are the major cause of aging. Though this has a lot of negative effects but this also has a small amount of positive effects such as the start of angiogenesis or cell proliferation.
What are two microscopic features of cardiac cells that help to distinguish them from other types of muscle cells?ANSWER: CORTICOSTEROIDS
The reaction of which Missy has experience that is a severe
and life threatening allergic reaction due to penicillin is anaphylactic reaction,
it could be classified as the a serious and life threatening in terms of having
allergic reaction for if not treated immediately, it could cause death to the
individual who has experience this reaction. This could be triggered from
either medications, food in which an individual has consumed and insect stings
such as from bees. Missy’s allergic reaction must have triggered because of the
penicillin that she has consumed where in, she does not know that she is
allergic to the medication, having her to experience a life threatening
allergic reaction to the penicillin.
