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Every organism on this earth whether it is a plant, an animal, or a microorganism is unique in itself. The basis of diversity is the uniqueness shown by different living organisms.
The term biodiversity coined by Walter G. Rosen in 1986 refers to the variability of life forms from all sources (terrestrial, aquatic, etc) in a particular region. The different life forms share the environment and a stable community comes into existence. However in recent times, human activities (e.g. pollution, deforestation) have played a crucial role in changing the balance of such communities.NCERT solutions for class 9 Scienceprepared by pw will help you to solve your NCERT text book exercise.