Answer:
ok help you with what? I got you if u give me brainliest
Explanation:
Saliva gland is held physical and chemical digestion
Answer:
nuclei, mitochondria and chloroplasts
Sweat glands sorry if im wrong not sure
Answer:
Earth's atmosphere is roughly 78 percent nitrogen and 21 percent oxygen, with trace amounts of water, argon, carbon dioxide and other gases. Nowhere else in the solar system is there an atmosphere loaded with free oxygen, which is vital to one of the other unique features of Earth: life.
