Which element is represented in all amino acids, but not necessarily in fats or carbohydrates?
hydrogen
carbon
nitrogen
oxygen

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.