Which of these best describes genetic drift? a) the movement of alleles between population b) random fluctuations in the gene frequencies within a population eliminate c) a planned method to reduce the number of inferior genes in a population d) the combining of alleles to create more genetic variations within a population

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla