Question

Assertion (A): Communities that comprise of more species tend to be more stable.

Reason (R): A higher number of species results in less year to year variation in total biomass.

Options

• Both (A) and (R) are true and (R) is the correct explanation of (A).

• Both (A) and (R) are true, but (R) is not the correct explanation of (A).

• (A) is true, but (R) is false.

• (A) is false, but (R) is true.

Answer 1

Both (A) and (R) are true, but (R) is not the correct explanation of (A).

Explanation:

Communities with more species are more resilient to disturbances, making them more stable. David Tillman's long-term tests revealed that plots with more species experienced less change in total biomass year after year.