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Which molecules may diffuse across a cell membrane without the expenditure of energy or the use of membrane proteins?
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19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase
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Biology, 22.06.2019 11:30
According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes
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Biology, 22.06.2019 13:10
Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow
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Biology, 22.06.2019 15:30
Me.henley said, βin the rat race we call life, only the strong will survive.β he may have been referring to
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Which molecules may diffuse across a cell membrane without the expenditure of energy or the use of m...
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