Answer:
Plants and animals use oxygen to respire and return it to the air and water as carbon dioxide (CO2). CO2 is then taken up by algae and terrestrial green plants and converted into carbohydrates during the process of photosynthesis, oxygen being a by-product.
Explanation:
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The Immune <span>system uses antibodies, proteins, and specialized cells, such as T-cells, to defend the body from microorganisms that cause disease.
In short, Your Answer would be Option A
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Breathing/movement, animals
The bacteria in the colony would be genetically too similar.