Why would hooke's discovery have been impossible without the invention of the microscope? a. because all living things are made up of cells. b. because cells are too small to see without a microscope c. because cells are the building blocks of life d. because electron microscope are necessary to see cells

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Approximately what wavelength of light is best absorbed by chlorophyll a

Which of the following is not associated with invasive species?