AIIMS 2017 Botany Productivity Assertion Reason Question
Read the Assertion and Reason carefully to mark the correct option from those given below Assertion Gross primary productivity is always more than net primary productivity. Reason Consumers exhibit secondary productivity in a ecosystem.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
Assertion is true but Reason is false
Both Assertion and Reason are false
Correct Answer
Detailed Explanation
Gross primary productivity (GPP) refers to the total amount of organic matter produced by photosynthetic organisms in an ecosystem, while net primary productivity (NPP) is the amount of organic matter available after accounting for the energy used in respiration by these organisms. Since GPP includes all the energy captured, and NPP is derived from GPP minus the energy lost to respiration, GPP is always greater than NPP. The reason given is also true, as consumers convert the energy stored in organic matter into secondary productivity, further supporting the assertion.
Option B is incorrect because, while both statements are true, the reason does explain the assertion. Option C is incorrect because both statements are true. Option D is incorrect as both the assertion and reason are valid.
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