Unit review mendel crossed two purple flowered pea plants to find that 3/4 of their offspring were purple and 1/4 were white. why did this happen?

Which statements are true of a scientific theory but not a hypothesis

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.

Why does the skin of your finger shrink when you wash clothes for a long time?