All the field mice that live in a field of light colored grass have tan fur. one of the mice is born with black fur. what would cause the black fur? a: mutation b: selective breeding c: adaptation d: natural selection

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 one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page