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BartSMP [9]
3 years ago
12

The oldest known fossil belongs to the cyanobacteria. How did this fossil help to alter the atmosphere of ancient Earth's oxygen

levels?
Biology
1 answer:
JulijaS [17]3 years ago
4 0
Cyanobacteria are autotrophic and perform photosynthesis. Photosynthetic organism produce oxygen in the exchange for Carbon Dioxide. Cyanobacteria caused oxygen levels to rise in Earths atmosphere.
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The same algae is subjected to conditions in which one is exposed to light and another is not exposed to light while the nutrients in the both systems are kept the same.

<h3>What is algae growth?</h3>

The growth of algae is the process by which the organism increases in size. Now we know that that the algae is photosynthetic hence light must be required for its growth.

In order to verify this, the same algae is subjected to conditions in which one is exposed to light and another is not exposed to light while the nutrients in the both systems are kept the same.

The results of this experiment must confirm that the algae exposed to light grows better than the algae that was not exposed to light.

Learn more about algae:brainly.com/question/4289110

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2 years ago
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kotegsom [21]
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Arturiano [62]

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It's B.

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