The external cue that animals use to synchronize their biological clock with the environment is called a

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Variety of living organisms; includes genetic, species, and ecological types.

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations