Deciduous forests A. have very little precipitation B. have very week topsoil C. have trees that shed their leaves seasonally D. are not useful commercially E. are not found in the US

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?

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above