Explain why scientists believe the Abert’s and Kaibab squirrels are examples of speciation.

Answer and explanation;

-The Kaibab Squirrel gives us one nice example of evolution occurring due to geographic isolation.

-About 10,000 years ago when the last ice age ended, physical formations in the canyon changed in a way that blocked the squirrels access to the Colorado River. The canyon became a geographic barrier separating the forests and squirrels on each rim. One population of squirrels had become two separate populations that could no longer interbreed, the kaibab squirrels. Abert’s squirrels are a North American species, found across a range of locations. Kaibab squirrels are a subspecies of Abert’s squirrels, found only in one area in the United States.

-Both the Kaibab squirrel and the Abert’s squirrel live in the ponderosa pine forests, where they build their nests out of twigs and pine needles. They eat acorns, fruit, and fungi, as well as the seeds, bark, and twigs of the trees where they make their home. The Kaibab squirrel's most significant source of food is the seeds found within ponderosa pine cones.

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?