The algae, bryophytes and pteridophytes are similar in that they

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Which of the following groups of invertebrates reproduces by budding?

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Hydra removes undigested food by

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Which of the following characteristics is common to Amoeba and Paramecium?

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Viruses are considered to be living organisms because they

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In a saprophyte, sex organs are produced in the

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In a reflex action, impulse flows from

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All the cell bodies in the spinal cord are found in

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If the blood is too concentrated, more water is absorbed from

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Which structure is the glomerulus?

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Free nitrogen is released to the atmosphere by

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What do bacteria in root nodules derive from the host plant?

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