What happened when a variegated leaf or a leaf partially covered with black paper was exposed to light?

What happened when a variegated leaf or a leaf partially covered with black paper was exposed to light?
  1. Photosynthesis occurred in the green parts of the leaves in the presence of light
  2. Photosynthesis occurred in the green and non-green parts of the leaves in the presence of light
  3. Photosynthesis did not occur in the green parts of the leaves in the absence of light
  4. Photosynthesis did not occur in the green and non-green parts of the leaves in the absence of light

Solution

When a variegated leaf or a leaf partially covered with black paper was exposed to light and tested for the presence of starch, it was clear that photosynthesis occurred only in the green parts of the leaves in the presence of light.

Asked in: NCERT

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