Answer:
Dry air is a mechanical mixture of nitrogen, oxygen, argon and several other gases in minor amounts.
Explanation:
C. The cell must be a plant cell.
Only plant cells have cell walls. Bacteria cells and animal cells do not. Both animal cells and plant cells have membrane-bound organelles, but since the student saw a cell wall, it must be a plant cell.
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Commensalism is when one organism B. Benefits and the other is unaffected.
Answer:
15% of the world does not have access to clean fresh water.
Explanation:
