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Show how sunlight is necessary for …

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Show how sunlight is necessary for plants ??
  • 2 answers

Aman Jyoti 5 years, 4 months ago

Sun is necessary for plant because sun gives light from which plants make their food .

Yogita Ingle 5 years, 4 months ago

To prove the necessity of sunlight in photosynthesis following steps need to do

  • Take a plant with destarched leaf.
  • Leaf is partially covered with black paper on which a design is cut.
  • Expose this plant to sunlight for few hours and perform a starch test with iodine solution.

Observation-

  • Covered leaf part shows brown colouration.
  • Exposed leaf shows blue-black colour.

Result- Starch is present in the exposed leaf.
Conclusion- Leaf exposed to sunlight give iodine test, proving that sunlight is necessary for photosynthesis.

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