The evolutionary adaptions to different environments are responsible for the variation in shape and function of the tetrapod forelimbs. It has been a common thing for organisms in the past to develop its certain body parts as an instinct to adapt the changes in its environment for survival.
Answer:
True
Explanation:
Although the amount varies, the overall amount of carbon on earth is stable.
"A gene pool consists of all genes, including all the different alleles that are present in a population. Number of times an allele occurs in a gene pool compared with the number of times other alleles occur. In genetic terms, evolution is any change in the relative frequency of alleles in a population."
