B they were domesticated shortly after
Answer:
Explanation:
The allele are fixed because there is no variation that exist in the population and the allele are almost completely the same hence no new combination of gene the same Allele will continue to reoccur
Variability exist because of random mating that occurs in the population initially when the toad filled up the entire central valley
Random mating ensures fitness in the initial population
Genetic drift acted upon the population drifting away allele that are very few in population or that occur less in the population and perpetuating alleles that frequently occur leading to a fixed allele.
There was a decrease in the population as a result of the change in the environment.
Answer:
A
Explanation:
A because the introns are edited then linked together by nucleotides
The Cytoplasm is responsible for giving a cell its shape. It helps to fill out the cell and keeps organelles in their place.
Answer:
This poisonis an example of an aboitic factor