What important event in animal evolution marks the beginning of the cambrian period?

a. the appearance of fossils

b. the appearance of hard parts

c. the ability to swim

What are some characteristics of a free enterprise economy?

Explain the significance of thesaurus geographicus

14) whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.