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There are about 50,000 vertebrate species, and they are placed in how many different classes?
answered
Jan 2
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Science
0
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75
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How is population density expressed?
answered
Dec 30, 2024
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Science
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52
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An electron in an atom is completely described by four of what?
answered
Dec 30, 2024
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Science
0
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37
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A goiter is a visible indication of deficiency of what?
answered
Dec 30, 2024
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Science
0
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74
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What molecule is made of two hydrogen atoms and one oxygen atom?
answered
Dec 28, 2024
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0
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34
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What do organisms use to store energy?
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Dec 28, 2024
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Science
0
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86
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What is the measure of the amount of energy found in sound waves?
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Dec 28, 2024
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68
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Sperm propel themselves through secretions in the uterus and enter what tube?
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Dec 28, 2024
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100
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A chain of what structures form as an oceanic plate moves over a hotspot?
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Dec 27, 2024
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99
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What part of a chromosome exists in different states of condensation at different times?
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Dec 27, 2024
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