Limiting Factors in Photosynthesis — NEET Biology
📚 Practice ConceptIf a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value; it is the factor which directly affects the process if its quantity is changed.
Which of the following statements correctly illustrate the application or principles of Blackman’s Law of Limiting Factors in photosynthesis? S1: If the light intensity is significantly below saturation, an increase in atmospheric CO₂ concentration will lead to a proportional increase in the rate of photosynthesis. S2: The phenomenon where the rate of photosynthesis eventually plateaus despite continuous increases in light intensity exemplifies Blackman's Law. S3: For C₃ plants, increasing temperature beyond their optimum (20-25°C) will always enhance photosynthesis if CO₂ levels are kept high. S4: In conditions of severe water scarcity, providing optimal light and CO₂ will not significantly increase photosynthesis, as water availability becomes the primary limiting factor. S5: Blackman’s Law is only applicable to external environmental factors and does not account for internal plant factors like chlorophyll content.
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