Answer:
it controls the heartbeat and movement of food
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Explanation:
Do you have the multiple choices that go to this question?
Oxygen was initially created in Earth's atmosphere by algaes. It is estimated that marine plants produce between 70 and 80 percent of the oxygen in the atmosphere. Nearly all marine plants are single celled, photosynthetic algae. Hope this answers the question.
It is the Prophase as the first stage of four.
Holding the atoms together
