In an aquarium, green plants are grown for the purpose of
A
CO2 production.
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B
Starch production.
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C
O2 production.
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D
Beautification.
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Solution
The correct option is CO2 production. Aquarium is an artificial ecosystem in which aquatic animals and plants are kept by man. The animals are heterotrophic organisms, which require oxygen. The aquatic plants are kept in aquarium to supply oxygen to heterotrophic animals. The aquatic plants on exposure to light carry out the process of photosynthesis in which oxygen is released as a by product.