Question

why is the leaf placed in sunlight for for at least 5 hours

Answer 1

Answer:

Plants rely on the energy in sunlight to produce the nutrients they need. But sometimes they absorb more energy than they can use, and that excess can damage critical proteins. To protect themselves, they convert the excess energy into heat and send it back out.

Answer 2

The leaf is placed in sunlight for at least 5 hours to show that sunlight is essential for photosynthesis.

About photosynthesis:

• Photosynthesis is the process of preparing food by the plants. They use sunlight and water to produce starch for their growth.
• There can be an experiment conducted to shoe that sunlight is essential for photosynthesis.
• In that the plant is initially destarched by keeping it in a dark room for 24 hours.
• Then it is brought out and only one leaf is covered using a black paper and the rest are exposed to sunlight for 4-5 hours.
• Later iodine test is performed to show that the leaves that are exposed to sunlight were able to produce food, whereas, the one that is covered cannot.
• Therefore : The leaf is placed in sunlight for at least 5 hours to show that sunlight is essential for photosynthesis.