Answer:
DNA must be unwinded so it can be used for replication or to create RNA.
Explanation:
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Nutrients are delivered by the blood through the capillary network.
The Exosphere is the outermost layer of the earth's atmosphere
The cell would die. This is because mitochondria are essential for making energy that the cell can use, if the mitochondria stopped working this energy would not longer be available to the cell. If the cell does not have energy, it cannot perform vital functions like respiration.
So we can tell how many times a heart beats per second
