Assertion and reason

Exercise and reference answers

Questions

1. Reason

   Nutrients would stay locked in dead matter instead of cycling back.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Removing decomposers would stall an ecosystem.

2. Reason

   They capture the solar energy that everything else draws on.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Producers sit at the base of the ecosystem.

3. Reason

   Species composition and stratification describe an ecosystem's structure.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   Energy flow is a structural feature.

Explanation