In the human body, muscle cells have an increased need for energy during exercise. To help supply this energy, the muscle cells will have more- * A. DNA
B. Protein
C. Chloroplast
D. Mitochondria

The instructions for making proteins come originally from

How do chloroplasts set plants apart from other living things

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13