What is, an important characteris of the cell wall

What is an animal that lives by preying on other animals

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?

Name one similarity and one difference between the morphology of a brachiopod and a bivalve