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Which one of the following is not a natural ecosystem ?
Why does a kitchen garden called an artificial ecosystem while a forest is considered to be a natural ecosystem?
While designing an artificial ecosystem at home, write any two things to be kept in mind to convert it into a self-sustaining system. Give reason to justify your answer.
Construct a food chain of four trophic levels comprising the following: Hawk, snake, plants, rat.
20,000 J of energy was transferred by the producers to the organism of second trophic level. Calculate the amount of energy that will be transferred by organisms of the third trophic level to the organisms of the fourth trophic level.
Why do we need to clean aquarium but not a pond? Explain.
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