AIIMS 2019 Botany Primary Productivity Assertion Reason Question
Assertion : During the process of photosynthesis amount of organic matter synthesized by producers per unit time and per unit area is referred to as net primary productivity. Reason : Due to abundance of sunlight primary productivity is usually high and sustained throughout the year in temperate areas.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Both Assertion and Reason are incorrect
Correct Answer
Detailed Explanation
Option D is correct because both the assertion and the reason contain inaccuracies regarding primary productivity. Gross primary productivity (GPP) is indeed highest in tropical regions, but the statement that net primary productivity (NPP) is always greater than 20 t ha⁻¹ year⁻¹ in the tropics is misleading, as NPP can vary significantly based on specific environmental conditions. Other options are incorrect because they either assert the correctness of the reasoning or the assertion without acknowledging these inaccuracies, which misrepresents the dynamics of photosynthesis and productivity across different biomes. Understanding the factors influencing GPP and NPP, such as sunlight availability and climate, is crucial for grasping ecosystem productivity.
Found an issue with this question?