Answer:
Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost. They have two unique properties that enable them to do this: They can divide over and over again to produce new cells. As they divide, they can change into the other types of cell that make up the body.
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The mid Atlantic rift is in the middle of the Atlantic Ocean where 2 plates diverge. That means that the 2 plates are moving away from each other, and the mantles lava is filling the gap between the two plates. The newest land is located closest to the ridge, and the oldest land is located farther away from the ridge.
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