Answer:
A. active transport
Explanation:
active transport is the movement of a substance across a membrane against its concentration gradient.
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Answer:
Chloroplasts are what give plants their green color. The second major difference between plant and animal cells is the cell wall. While both plant and animal cells have a cell membrane, on plants have a cell wall.
Answer:
umm is this a staement or a question
Explanation:
Such direct observational evidence is limited, however, and clouds remain the biggest source of uncertainty--apart from human choices to control greenhouse gases—in predicting how much the climate will change
