Consider these observations made by a student watching an aquarium tank containing marine snails. a tank contained snails that were crawling all over the sides of the tank. when an opened mussel was introduced in the middle of the tank, the snails began to move quickly toward the food. based on these observations, frame two hypotheses that you can test.

Which organ controls breathing? lungs alveoli heart diaphragm

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.

How many pounds does the earth weigh?