If the mitochondria was a part of a school, what would it be?
for example, the nucleus is the principal of the school

The number of living organisms in a particular area is

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -