In an aquatic environment, microscopic animals and plants are collectively known as
A
Commensals
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B
Herbivores
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C
Fauna and flora
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D
Planktons
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Solution
The correct option is D Planktons Aquatic ecosystems usually contain a wide variety of life forms including bacteria, fungi, protozoan and bottom-dwelling organisms, such as insect larvae, snails, and worms but the free-floating microscopic plants and animals are known as plankton. The commensal (the species that benefits from the association) obtain nutrients, shelter, support, or locomotion from the host species, which is unaffected. A herbivore is an animal, that gets its energy from eating the plants. Fauna is the animal life of any particular region. The corresponding term for plants is flora.