Biology, 08.01.2021 22:20 mrashrafkotkaat
What do different scientific theories about how life began on Earth in common?
-early Earth had to warm considerably after it's formation before it could support life
-early life was aquatic because all of Earth was initially covered by ocean
-a seed of life was started thorough meteorite bombardment
-Carbon based molecules formed in an oxygen poor environment
Answers: 1
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Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes
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Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.
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What do different scientific theories about how life began on Earth in common?
-early Earth had to...
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