I would assume it is choice b.
because in the summer there are more hours of light, and n the winter there are less.
Rubidium...................
A<span>ctive transport because passive transport does not as well as diffusion.
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DNA splitting is DNA replication.
Answer:
Active transport uses ATP and moves substances against the concentration gradient; facilitated diffusion does not.
Explanation:
Active transports moves against the concentration gradient (hence why it needs energy or ATP to do so, its going "against the grain"). Facilitated diffusion does not require ATP but does something require carrier proteins during passive transport.