Question

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

Reason: A higher number of species results in less animal variation in total biomass.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

The correct option is A If both assertion and reason are true and reason is the correct explanation of assertion

Communities with higher number of species are more stable as it can resist occasional disturbances. A stable community should show less variation in productivity from year to year and resistance towards invasion by alien species. That is there is less variation in case of invasion of other species or extinction of an existing species.