After chromosomes are duplicated, the identical copies A. divide again before mitosis can begin. B. are attached to each other by a cytosome. C. are called twin chromosomes. D. are attached to each other by a centromere. E. are separated and paired with their homologous chromosomes.

What are some natural processes that represent physical and chemical changes?

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.

Pl as time goes by and water goes through the water cycle again and again, the amount of water on earth: increases decreases ostays the same goes up and down