When the embryo reaches about 500 cells, which best describes its growth and division? A. Both daughter cells are stem cells at this point, and are smaller than the parent cell.

B. One daughter cell is a stem cell, one is a tissue cell, they stop being longer than the parent cell.

C. Both daughter cells become specialized cells, they stop being smaller than the parent cell.

D. One daughter cell is a stem cell, one is a specialized tissue cell, both are smaller than the parent cell.

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.