The cell wall is the outside layer of the cell whereas the cell membrane is surrounds the cytoplasm of the cell.
If an atom is unstable it can become stable by the gain or loss of electrons.
Answer: D
Explanation:
Many unicellular organisms live in bodies of water and must move around to find food. Most often, they must obtain nutrients by eating other organisms. Plant-like protists, and some types of bacteria, can make their own food through photosynthesis.
Species is the most narrow category
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