Which of the following is the best statement about natural selection? explain how you got your answer.

a. most populations of organisms evolve to become more and more alike, eventually becoming genetic clones

b. some individuals in a population have a variation that gives them an advantage to survive and reproduce.

c. if a population becomes isolated from others, the possibility for mutations to occur decreases and extinction results.

d. a stable environment and less variations in a population’s gene pool promotes evolution of new species.

How does the study of genetic disorders such as pku biologists understand normal alleles?

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

In "the man in the water," what was the remarkable occurrence that rosenblatt reported?