NEET Biology question
Each question contains ASSERTION (Assertion) and REASON (Reason). Each question has the 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct. **Assertion:** A stable community should not show too much variation in productivity from year to year. **Reason:** A stable community must be resistant to invasions by the alien species.
Solution
Both statements are true: a stable community indeed should not show too much variation in productivity from year to year, and it must also be resistant to invasions by alien species, as David Tilman's long-term ecosystem experiments demonstrated that plots with more species show less year-to-year variation in total
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