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Answer:
Homeostasis
Explanation:
Homeostasis means that there is an equilibrium in the cell. Moving materials either in or out helps to ensure that both inside and outside the cell are equal.
Answer:
hydrogen
Explanation:
Basically, stars are big exploding balls of gas, mostly hydrogen and helium. Our nearest star, the Sun, is so hot that the huge amount of hydrogen is undergoing a constant star-wide nuclear reaction, like in a hydrogen bomb.
Answer:
Mantle is the answer
Explanation:
The Earth can be divided into four main layers: the solid crust on the outside, the mantle, the outer core and the inner core. Out of them, the mantle is the thickest layer, while the crust is the thinnest layer.
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