Question

Ecosystem is a self-sustaining unit because it consists of

• A. Plants and animals only
• B. Physical environment only
• C. Microbes only
• D. All of the above

Answer 1

The correct option is D All of the above

Under natural conditions, all living organisms in an ecosystem are interacting, co-habitating and interdependent. This enables the self-sustenance in an ecosystem. A change in any of these results in collapse of the ecosystem. Thus the correct answer is option D.