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Biology
What are the tiny air sacs in the lungs called?
Biology
What are the tiny air sacs in the lungs called?
Alveoli
Alvins
Bladder
Trachea
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Which pair of animal species and type is correct?
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Which is the sheet-like muscle at the bottom of a human chest?
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What is the leaf of a fern called?
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Which of the following is not an organelle in an animal cell?
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Which of these is not an insect?
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