The sentence that is true is A galaxies are holder together by gravity it is not D because galaxies are real its not C because they are not being pulled apart and its not B because galaxies are held together.
If ΔG is negative, the reaction is always spontaneous.
If ΔG is positive, the reaction is non-spontaneous and will require a sustained input of energy for it occur.
If ΔG is zero, the reaction is at equilibrium and no work can be done.
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The waste products of one are what the other needs to preform and make enegery and they both make energy
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I think its true i dont really know. hope this helps!!
Answer:After the breakup of Pangaea early in the Mesozoic Era, reptiles were the dominant form of land animal. ... Mammals became more prevalent, and angiosperms spread throughout the Cenozoic Era.
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