12. What group of organisms are most in danger of extinction? those with small populations

both a and b

those with large populations that breed quickly

those that migrate or need special habitats

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

What occurs to the cell during mitosis

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48