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a chromosome is a cell structure made of DNA,which is found in the nucleus of a cell.
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C, Both parents have the blue-eyed gene.
River water contains minerals and nutrients that can be beneficial to plants on the land, helping them to grow.
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Declining populations of phytoplankton, the basis of the marine food chain, will alter the seawater hues, potentially decimating fisheries. The world's oceans are warming and growing more acidic as a result of climate change, and a provocative new study suggests they'll be changing color too.
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For the eggs to survive and have a chance of hatching, sea turtles must lay their eggs on sandy beaches. As they are developing, the embryos breathe air through a membrane in the eggs, and so they cannot survive if they are continuously covered with water.
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