A farmer in Guyana noticed that his cassava plants had wilted leaves with closed stomata during a dry spell. What is the most likely immediate effect of stomatal closure on the plant?

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Question

A farmer in Guyana noticed that his cassava plants had wilted leaves with closed stomata during a dry spell. What is the most likely immediate effect of stomatal closure on the plant?

Accepted Answer

Decreased rate of transpiration — Decreased rate of transpiration. Award 1 mark for recognising that closed stomata reduce water loss through transpiration. A is incorrect — photosynthesis would decrease due to reduced carbon dioxide entry. C is incorrect — stomatal closure does not directly increase root absorption. D is incorrect — respiration occurs in cells and is not immediately affected by stomatal closure.

Answer

Decreased rate of transpiration

Answer

Increased rate of photosynthesis

Answer

Decreased rate of respiration

Answer

Increased absorption of water by roots

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