Answer the following questions.
1. What is chlorophyll?
2. What are the functions performed by a leaf?
3. Explain the process of photosynthesis with the help of a diagram.
4. What happens to the food prepared by a leaf?
5. Write what happens in the following cases:
clice
Answers
Answer:
1) Chlorophyll is any of several related green pigments found in the mesosomes of cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words χλωρός khloros and φύλλον, phyllon. Chlorophyll is essential in photosynthesis, allowing plants to absorb energy from light.
2) The main function of a leaf is to produce food for the plant by photosynthesis. Chlorophyll, the substance that gives plants their characteristic green colour, absorbs light energy. The internal structure of the leaf is protected by the leaf epidermis, which is continuous with the stem epidermis
3) The process that plants carry out in the presence of radiant energy in order to create their food is known as photosynthesis. This process is one of the reasons because of which man and other forms of life are alive on the Earth today. This process bcasically occurs in the green parts of leaves. This process requires the following ingredients.Water Soil Sunlight Carbon dioxide Chlorophyll
Soil does not become directly involved in the process of photosynthesis, but the plant absorbs some important ingredients, that are present in the soil, Chlorophyll is actually a chemical that is found in most of the plants and imparts green color to them. The process of photosynthesis actually becomes possible due to the chlorophyll that is present in plant leaves. During this process of food generation, the following reaction takes place
4) The food prepared by the plants in their leaves through photosynthesis (The process of synthesising food with the help of carbon dioxide and water in the presence of chlorophyll and sunlight) is transported to all parts of the plant in the form of a solution, through translocation which takes place through 'phloem.
5) If you put a few drops of iodine solution on a potato slice the area which comes in the contact of iodine solution will turn blue-black due to the presence of starch. Leaves contain starch which gives blue-black color with iodine solution.
