In 1949, linus pauling first proposed that genetically linked diseases were cause by molecular defects in the proteins that genes code for. one of the first examples to support this theory was provided by the sickle-cell hemoglobin disease. describe the physiological effects of this disease along with the molecular defect that has been determined as its cause

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