The green plant in the ecosystem are called producers. In a terrestrial ecosystem, major producers are herbaceous and woody plants. Likewise, producers in an aquatic ecosystem are various species like phytoplankton, algae and higher plants.
Assertion (A): Green plants function as producers in ecosystem energy flow. Reason (R): In terrestrial ecosystems, the major producers are herbaceous and woody plants.
Correct answer: B — If both assertion and reason are true but reason is not the correct explanation of the assertion.
NCERT states “The green plant in the ecosystem are called producers” and “In a terrestrial ecosystem, major producers are herbaceous and woody plants.” Both statements are true from NCERT. However, the Reason doesn’t explain WHY green plants are producers - it simply provides examples of producer types in terrestrial systems. The Reason is related but doesn’t explain the functional role that makes plants producers.
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