D) to move molecules across the membrane against a gradient
I think this is called relative dating...............
Answer: 5.300 j
Explanation:
i answered it and got it right
Answer:
The principle of seafloor spreading states that new ocean crust is always being formed, and that this crust is slowly carried farfar from its factor of starting place over a duration of time. The examine of the repeated reversal of the Earth's magnetic poles through the years has supplied convincing proof of seafloor spreading.
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