Biology

How many chambers make up the human heart?

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What are the claws of a bird of prey called?
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What do trees lose in the start of winter weather?
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Which of these African grassland animals shares a food source with the zebra?
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Which of these is a part of blood?
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What powdery substance contains the male sex cells of a flower?
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What animal has the biggest and heaviest brain among all animals?
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What do conifers use to hold seeds?
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Which of these snakes is a pit viper?
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