Which units are used in a pyramid of numbers? O A. Individuals
B. Kilocalories
C. m/s2
O D. g C/m2

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.

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

Solutions to environmental problems in europe must