Q1. [1] § 13.1.1 Food Chains and Webs
Assertion (A) : All organisms can make organic compounds like sugar and starch from inorganic substances using radiant energy of the sun.
Reason (R) : The organisms which can produce food by photosynthesis are called producers.
- A Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- B Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- C Assertion (A) is true, but Reason (R) is false.
- D Assertion (A) is false, but Reason (R) is true.
Previously asked in CBSE board exam
2025 31/5/1 Q20
Generated by claude-sonnet-4-6 · 2026-06-15 06:43 · grounding rag
Model Answer
Answer: D
The Assertion is false because only autotrophs (green plants, some bacteria), not all organisms, can make organic compounds from inorganic substances using sunlight. The Reason is true — organisms that produce food by photosynthesis are called producers.
Explanation
- The key error in Assertion (A) is the word "All organisms" — heterotrophs (animals, fungi) cannot make food from inorganic substances; only autotrophs/producers can.
- Reason (R) is correctly stated as per the textbook.
- Since A is false and R is true → Option D is correct.
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