Science
(i) List two human-made ecosystems.
(ii) "We do not clean a pond in the same manner as we do in an aquarium." Give reason to justify your answer.
Answer
(i) Two human-made ecosystems are:
- Agricultural field
- Aquarium
(ii) Pond has a natural ecosystem. It has many decomposers present in it due to which the pond is naturally cleaned up. It is a balanced and self sustaining ecosystem. An aquarium, however is not self sustaining. We need to clean it up and change its water in order to remove the waste produced by the fishes or the leftover food in there as these may further act as toxins for water and aquatic life.
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