Question

Which of the following is/are true about an ecosystem?

• A. Ecosystem consists of biological community and physical environment.
• B. Ecosystem may have fixed or varying environment.
• C. Ecosystem can be as small as a droplet of water or as large as Earth.
• D. Ecosystems always stay constant.

Answer 1

Answer: (A), (B), (C)

The correct options are
A Ecosystem consists of biological community and physical environment.
B Ecosystem may have fixed or varying environment.
C Ecosystem can be as small as a droplet of water or as large as Earth.

An ecosystem consists of a biological community i.e., living organisms (biotic components) and a physical environment or abiotic components. An ecosystem may have a fixed or varying environment. It may be as large as the Earth or as small as a droplet of water which contain many microorganisms.