Anaerobic respiration occurs when water levels are low light intensity is low ph is unbalanced oxygen is not present

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 -

3differences between bacteria and other 2 cells

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping