B I think because it would have to be 25% so then Aa would be appropriate as of it's recessive.
D. fossils will help you discover how old the rock is, fossils would not be included in the question if the answer does not relate to them
They will actually explode or burst
So What happens is the pure water outside has a high water potential while the cytoplasm inside the animal cell is a low water potential, water will diffuse down a water potential gradient through the semi-permeable membrane of the animal cell and cause the cell to swell (inflate like a fully-blown balloon), the result is that the delicate, elastic cell membrane<span> can't tolerate the internal pressure coming from the cytoplasm so it tears causing the cell to burst.</span><span>
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