A) commensals
B) herbivores
C) fauna and flora
D) planktons
Correct Answer: D
Solution :
In an aquatic environment, microscopic animals and plants are collectively known as planktons. Plants like Spirogyra, Volvox etc, are called phytoplanktons and animals like rotifers, protozoans etc, are called zooplanktons.You need to login to perform this action.
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