CO₂ Enrichment Effects on C₃ Plants — NEET Biology
📚 Practice ConceptThe fact that C₃ plants respond to higher CO₂ concentration by showing increased rates of photosynthesis leading to higher productivity has been used for some greenhouse crops such as tomatoes and bell pepper. They are allowed to grow in carbon dioxide enriched atmosphere that leads to higher yields.
Which of the following statements are NOT correct regarding factors affecting photosynthesis, particularly in a controlled environment like a well-lit greenhouse? S1: In a well-ventilated greenhouse, CO₂ availability for C₃ plants is rarely a limiting factor under optimal light and temperature conditions. S2: The practice of CO₂ enrichment in greenhouses is primarily aimed at enhancing the photosynthetic rate of C₄ plants by minimizing their photorespiration. S3: If the temperature in a greenhouse rises significantly above the optimum range for C₃ plants, it can become a limiting factor for photosynthesis, even with ample light and CO₂. S4: Even in a well-lit greenhouse, water stress can indirectly limit photosynthesis by inducing stomatal closure, thereby reducing CO₂ availability. S5: Blackman's Law of Limiting Factors applies, stating that the rate of photosynthesis is determined by the factor closest to its minimal value.
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.