Biology

What "trapdoor" on your windpipe helps keep out food particles?

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What part of the blood helps clotting?
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Which of the following is not one of the southern yellow pine trees?
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Where does the zygote of a gymnosperm develop?
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Animals which eat both plants and other animals are known as what?
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What is the name of the animal group that includes mites, ticks and scorpions?
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What is the correct order of a butterfly's life cycle?
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Which of the following animals might a heron eat?
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Approximately how much does the large head of an Elephant seal weigh?
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