In the sickle cell activity, what happened to the allele frequencies (the percentage of surviving alleles that were HbA and the percentage of surviving alleles that were HbS) over the course of the experiment? Why did this happen?

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

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