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Macromolecules & Enzymes › View

What macromolecule has only carbon, hydrogen, and oxygen, and nitrogen (CHON)?

A. lipid

B. carbohydrate

C. protein

D. nucleic acid

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Population Ecology › View

This is the study of organisms and their interactions with the environment.

A. Biology

B. Geology

C. Chemistry

D. Ecology

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