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A rock contains 25% of the potassium-40 it started with. How old is the rock?
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28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?
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Northern switzerland has a fairly cold climate caused by sea winds from the atlantic ocean but souther switzerland tends to be much warmer and sunnier, what could cause this difference?
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A rock contains 25% of the potassium-40 it started with. How old is the rock?...
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