Atp provides energy for active transport in cells?

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?

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

Ecology can best be described as the study of what