The trophic level which includes the greatest amount of available energy is made up of
organisms which-
Z. break down organic matter to release energy.
Y. convert sunlight to chemical energy.
X. hunt animals for their energy needs.
W. receive the energy they need from plants.

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.