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Which of the following is hypothesized to be the early source of free oxygen in earth's atmosphere? a. photosynthesis by cyanobacteria b. ionization of water molecules c. respiration of fish d. decay of animal remains
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What are the four basic classes of organic molecules how do they differ structurally and functionally
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What advantage does a crop that undergoes vegetative reproduction have over plants that start from the seed? 1points a they store nutrients. b they can travel farther. c they experience more genetic variation. d they only occur in high-resource environments.
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Biology, 22.06.2019 10:10
What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b.a light particle
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Which of the following is hypothesized to be the early source of free oxygen in earth's atmosphere?...
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