Question

5. How will you test that chlorophyll is necessary for photosynthesis?
6. Sunlight is important for the plants to make food. Explain with the help of an active
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Answer 1

Answer:

5. Take a variegated leaf of the potted plant kept in bright sunlight. Trace the outline of leaves and its variegated parts on the tracing paper (the variegated leaves show pale yellow spots in green leaves. These areas indicate the absence of chlorophyll). ... Thus, the chlorophyll is essential for photosynthesis.

6. Without the sun, plants can't get the food they need to grow, reproduce and survive. Unlike animals, plants are autotrophs, meaning they create their own food source. They use energy from light or from the sun, water and gases from the air to create glucose. This process is photosynthesis and all plants, algae and even some microorganisms use it.

The sun is the main source of energy for almost every living thing on Earth. It gives a plant the light energy it needs to photosynthesize, which converts that light energy into a storable form (glucose) and keeps plants alive. A by-product of photosynthesis is the oxygen all animals need to survive.

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