What was the conclusion of the experiment described in the paragraph?

What was the conclusion of the experiment described in the paragraph?
  1. Light is not required for photosynthesis
  2. CO₂ is not required for photosynthesis
  3. CO₂ is required for photosynthesis
  4. KOH is required for photosynthesis

Solution

The conclusion of the experiment described in the paragraph is that CO₂ is required for photosynthesis. This is concluded from the observation that the portion of the leaf exposed to air tested positive for starch while the portion that was in the test tube with KOH, which absorbs CO₂, tested negative.

Asked in: NCERT

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