Which process use carbondioxide present in the air a. Burning of fossil fuels b. Production of glucose c. Asimillation in animals d. Breakdown of organic matter

How many cells are our body made of ? ♡

Explain how scientists use geologic time to determine the age of landforms.

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 -