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Which organ produces antibodies to fight infections?
Which vitamin helps in blood clotting?
What is the term for animals that are active at night?
What is the study of fungi called?
Which mineral is essential for strong bones and teeth?
Which part of the plant conducts photosynthesis?
What is the smallest unit of life?
What causes rainbows to form in the sky?
Which scientist proposed the theory of relativity?
Which gas makes up the majority of the human body by weight in terms of elements?