In a population of certain moths in which the allele for brown wings is dominant to the allele for green wings, a drought leads to selection against the green-winged moths. When the drought ends, 21% of the remaining moths exhibit the green-winged phenotype. If the population is now in Hardy-Weinberg equilibrium, what will be the frequency of the green-winged allele in the next generation

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?