Which statement best describes the role of plate tectonics in changes that occur on Earth?A. The movement of plates builds pressure that is released during an earthquake.B. Convection currents in the mantle cause mountain ranges to slowly collapse over time.C. The subduction of oceanic crust cools the mantle and prevents volcanic eruptions.D. Seafloor spreading causes ocean basins to get smaller and shallower over time.

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.