Answer:
The correct answer is "The frequency of the B allele increased due to the selective pressures of the environment".
Explanation:
The missing part of the question is "Which of the following could best explain the increase in the frequency of the B allele in the population after five years?" at which the answer is "The frequency of the B allele increased due to the selective pressures of the environment".
In this study, the allelic frequency for black fur (B) in eastern gray squirrels Sciurus carolinensis changed from B=0.4 to B=0.6 within a lapse of five years. This increase is explained by the effect of selective pressures of the environment. For instance, is likely that new predators were more likely to detect squirrels with gray fur over black fur, or changes in the landscape benefited the black fur squirrels camouflage.
<span>T he type of selection that favored progressively larger brain size in human evolution is
</span>directional selection. Directional selection is a type of natural selection (besides stabilizing selection, disruptive selection, kin selection,..)<span> in which an extreme phenotype is favored over other phenotypes. Because progressively larger brain size is an extreme phenotype this is a directional selection.</span>
The hormones that stimulate the breakdown of liver glycogen are epinephrine and glucagon. Epinephrine is the one that triggers the glycogen breakdown inside the muscle and also inside the liver. However, the liver is the one that is more active or responsive to the hormone called glucagon than the muscles. A glucagon is a hormone which is a polypeptide hidden by the cells of our pancreas called α cells whenever our blood-sugar is low. This hormone indicates the state of starving.
Epithelial cells are mainly used for protection; in the urinary tract, these tissue cells are used to protect the bladder from toxic urine. The tissue can also expand to hold larger quantities of urine.
Answer:
Repetitive DNA segments: transposable elements.
I hope it helps.
