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Cells require a structure that regulates the transfer of material in and out of the cell. This structure is the -
cell membrane.
mitochondria.
nucleus
chloroplast
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Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5
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Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. what is the independent variable for this experiment?
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Cells require a structure that regulates the transfer of material in and out of the cell. This struc...
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