Answer: The primary function of leaves is to collect sunlight, for use in photosynthesis.
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True
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Density. Density is the measurement of how much matter is in a substance
Answer: (1) photosynthesis occurred
Explanation: The photosynthesis process in cianobacteria changed the composition of earth's atmosphera, rising oxygen levels. This could be possible since photosynthesis used energy from the sun to produce energetic intermediaries to synthesize sugars, and as byproduct due to water photolisis, is oxygen.
