Transpiration: Factors and Mechanism · NCERT Biology

How much of the water reaching the leaves is typically used in photosynthesis and plant growth?

  1. Less than 1 percent
  2. About 5 percent
  3. Nearly 50 percent
  4. More than 90 percent
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Correct answer: Less than 1 percent

Plants absorb massive amounts of water, but less than 1 percent is actually used for growth and photosynthesis. The remaining 99 percent is lost to the atmosphere through transpiration.

Difficulty: Medium Question 7 of 20

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