Answer:
D
Explanation:
When a substance moves from low to high concentration it is moving against its concentration gradient, which requires more energy.
A. It depends on where it is moving, not the substance
OB. This is describing diffusion
OC. Does not require energy, it is passive transport through a semi-permeable membrane
Answer:
I believe the answer is "C. When your cells need more oxygen."
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Answer:
small sprouts will compete for the remaining space that has adequate sunlight