Biology

What substance is produced by flowers and sometimes causes hay fever?

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What SPF should the sunscreen that you use be at the lowest?
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What is a cell that provides energy for another organism called?
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Which one of these activities are a part of a plant's life cycle?
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Which of the following is not a component in blood?
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What are the gaps between nerve cells called?
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What does the zygote form once it starts mitosis?
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What do we call things that directly affect all activities of cells?
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Which of these animals does not typically hibernate?
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