Which elements, typically found in carbohydrates, would be expected to be used by the body to help make proteins and lipids? Select all that apply.
1. iron
2.carbon
3.sulfur
4.hydrogen

(There’s more than one! :))

Which of the following is not a benefit of green revolution? a) new crop varieties b) increased crop yields c) cost effective d) new crops may require larger amonts of water than the previous ones.

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

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?