The mechanism that affected the gene pool of the immigrants that entered the United states Through Ellis Island is Gene flow.
Gene flow involves the movement of genes or alleles between interbreeding populations of a particular species. In other words it is the movement of genes from one population to another population. Actually it may be an important aspect of evolution; evolution can occur as a result of genes being transferred from one population to another. Gene flow occurs when there is migration, since the loss or addition of people can easily change pool frequencies even without no other evolutionary mechanisms operating.
I would say that your correct answer is B
The answer is microspore and megaspore. hope that helped
You can find it in a swamp, or near a swamp. You find it in shady and damp areas.
abiotic factors.
An abiotic factor is a non-living part of an ecosystem that shapes its environment.
