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Water/salt balance is mainly handled by the kidneys.
Hence the keyed answer is Kidney.
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Speleology studies caves.
So the correct answer is Speleology.
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Henri Becquerel discovered radioactivity in 1896.
Hence the keyed answer is 1896.
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Such particles form cosmic rays.
So the correct answer is Cosmic rays.
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According to the keyed exam answer, excess WBCs cause leukaemia.
Editor note: clinical terms differ; options left unchanged.
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Tropism is directional growth of a plant toward/away from a stimulus.
So the correct answer is Directional growth of a plant.
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