(a) Generally, light is not a limiting factor. It becomes a limiting factor for plants growing in shade or under tree canopies. In the given graph, light is a limiting factor at the point where photosynthesis is the minimum. The least value for photosynthesis is in region A. Hence, light is a limiting factor in this region.
(b) Light is a limiting factor in region A. Water, temperature, and the concentration of carbon dioxide could also be limiting factors in this region.
(c) Point D represents the optimum point and gives the light intensity at which the maximum photosynthesis is recorded. The rate of photosynthesis remains constant after this point, even though the intensity of light increases in region C.
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This question is important because it tests key concepts from the NCERT syllabus and is frequently asked in CBSE exams.
This question is based on core NCERT concepts explained in the chapter and should be revised thoroughly before exams.
(a) Generally, light is not a limiting factor. It becomes a limiting factor for plants growing in shade or under tree canopies. In the given graph, light is a limiting factor at the point where photosynthesis is the mini...
Step-by-step explanation:
• (a) Generally, light is not a limiting factor
• It becomes a limiting factor for plants growing in shade or under tree canopies
• In the given graph, light is a limiting factor at the point where photosynthesis is the minimum
• The least value for photosynthesis is in region A
• Hence, light is a limiting factor in this region
Students often lose marks by skipping steps, writing incomplete explanations, or misunderstanding keywords used in the question.
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