Plant cells have large, round vacuoles they primarily use for -

A) water storage

B) energy production.

C) protein synthesis.

D) waster removal

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.

This is collection of data made by comparing objects in standard units. in science, the units are metric.

The smallest parts of these that retain their original properties are called