Biology, 13.09.2019 05:30 jennamae9826
The oxygen revolution changed earth’s environment dramatically. which of the following took advantage of the presence of free oxygen in the oceans and atmosphere?
a. the evolution of cellular respiration, which used oxygen to harvest energy from organic molecules
b. the persistence of some animal groups in anaerobic habitats
c. the evolution of photosynthetic pigments that protected early algae from the corrosive effects of oxygen
d. the evolution of chloroplasts after early protists incorporated photosynthetic cyanobacteria
Answers: 2
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Biology, 22.06.2019 09:00
This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.
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Biology, 22.06.2019 10:30
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The oxygen revolution changed earth’s environment dramatically. which of the following took advantag...
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