Answer:
carbon, hydrogen, nitrogen and oxygen
Explanation:
mostly, combination of carboxylic and amine groups
Explanation:
base on the person opinion
Answer:
1: cell membrane
2. chloroplast
Explanation:
1. the cell membrane is the outer layer of an animal cell since they don't have cell walls
2. only plant cells have chloroplasts
The two subjects are both dealing with flesh, the human skin