In northern Canada, a population of rabbits was predominantly white in color. The allele for white color is recessive while the
allele for gray color is dominant. Over the last several decades, the average annual temperature of this area has increased and the long-term deposits of ice and snow have become scarce. In this case, the frequency of a previously rare allele becomes more frequent in the population. This is an example of A) nonrandom selection.
B) disruptive selection.
The correct answer is option C) "directional selection".
Explanation:
Directional selection is a type of natural selection characterized by extreme characteristcs of a trait being favored over medium ones. The genetics behind directional selection are based on an allele being favored over the others, either by environmental or biotic conditions. The rabbits in northern Canada is an example of directional selection because a previously rare allele becomes favored due to a change in the environmental conditions. Therefore, the rare allele is selected and now becomes more frequent in rabbits.
The integumentary system is the skin. Skin protects the inner organs from Bactria. Essentially the skin is a wall protecting against the outside world. It doesn't really release anything but is just there for protection.
It also provides an extremely stable backbone with the negatively charged phosphates pointing to the outside of the molecule. This charge aids in the attachment of other molecules to the strand of DNA. DNA double helix allows it to be stable and it won't easily destroyed.
