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Railways PYQCBT 1 2016

RRB NTPC · Question 73

Aquarium is container in which there are living fish and aquatic plants. Which statement about aquarium is correct?

  1. It is human made ecosystem

  2. It is a natural ecosystem

  3. It is not an ecosystem at all

  4. It can only be termed a community

Show answer & explanation

Answer: (A) It is human made ecosystem

Explanation

An aquarium contains living organisms (fish, plants, microbes) interacting with non-living parts (water, light, gravel), so it is an ecosystem. Because people build and maintain it, it is a human-made (artificial) ecosystem.