1. Both processes cannot happen simultaneously. 2. Both processes can happen together because the diffusion coefficient of water and CO ₂ is different. 3. The above processes happen only during night time. 4. One process occurs during day time, and the other at night.

Topic: Factors affecting photosynthesis· Plant Physiology

Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options :

1. Both processes cannot happen simultaneously.

2. Both processes can happen together because the diffusion coefficient of water and CO\(_2\) is different.

3. The above processes happen only during night time.

4. One process occurs during day time, and the other at night.

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 neet Save WhatsApp Report

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Answer: 2. Both processes can happen together because the diffusion coefficient of water and CO\(_2\) is different.

Both processes can occur together because water vapour and CO₂ have different diffusion coefficients, and the gradients for each go in opposite directions through the open stoma (water out, CO₂ in). Stomata are open in the day when photosynthesis takes place, so the other options are wrong.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of following options :

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