The body can be invaded by , which are harmful microorganisms that cause diseases. The body then initiates a(n) response, which may involve redness, swelling, and fever.

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

What is the ecological role of food chains and food webs

Aprocedure done under controlled conditions to test a hypothesis is an inquiry.