Answer:
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The first option for 1 and the second option for 2
A is the active site and C is the enzyme
Answer:
The return of blood to the heart is assisted by the action of the skeletal- muscle pump. As muscles move, they squeeze the veins running through them. Veins contain a series of one-way valves, and they are squeezed, blood is pushed through the valves, which then close to prevent backflow.
Answer:
I think prokaryotes
Explanation:
sorry if wrong did this subject long time ago
