Multiple choice

About ______ percent of the water absorbed by plants is used for photosynthesis.

  1. 75 - 80%

  2. 25 - 30%

  3. 10 - 15%

  4. 1 - 2%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Only about 1-2% of the water absorbed by plant roots is actually used in photosynthesis to produce carbohydrates. The remaining 98-99% is lost through transpiration. This water loss is necessary to create the transpiration pull that drives water and mineral absorption from soil, making it essential despite the inefficiency.

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