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So you will know if you go their answer/question page
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D. a continuous rise and fall of water in season oceans
DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.
For a white wolf, I suggest the Tundra Biome. The wolf's fur blends in with the snow, making it unable to be seen.