CBSE Class 10 Science 2015 Term II Outside Delhi Set 2

© examsnet.com
Question : 11
Total: 12
What is an ecosystem ? List its two main components. We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.
Solution:  
All the interacting organisms in an area together with the non-living constituents of the environment form an ecosystem. The two main components of ecosystem are biotic and abiotic. An aquarium needs to be cleaned regularly due to lack of decomposer that can clean naturally by decomposing organic compounds.
© examsnet.com
Go to Question: