How are bacteria, a rose and a elephant alike

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?

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

What is the next step in muscle contraction after the actin changes shape? (apex)