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Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?
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Which of the following explains why a tree is often used as a model to represent the principle of common descent
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The backbone of the double helix has an alternating molecules. what do you call these alternating molecule?
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⦁ At what time of day does photosynthesis take place?...
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