A farmer in Guyana noticed that rice seedlings submerged in flooded paddies survived for several days despite low oxygen levels in the waterlogged soil. Which type of respiration allowed the seedlings to survive?

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Question

A farmer in Guyana noticed that rice seedlings submerged in flooded paddies survived for several days despite low oxygen levels in the waterlogged soil. Which type of respiration allowed the seedlings to survive?

Accepted Answer

Anaerobic respiration — Award 1 mark for identifying that plants can switch to anaerobic respiration when oxygen is limited. A is incorrect — aerobic respiration requires oxygen which was scarce. C is incorrect — photosynthesis produces glucose but does not release energy for survival. D is incorrect — transpiration is water loss, not an energy-releasing process.

Answer

Photosynthesis

Answer

Anaerobic respiration

Answer

Aerobic respiration only

Answer

Transpiration

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