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Answers
ans 1.) Organisms need to take food to get energy and perform life processes. ... To perform all these life processes the organism needs energy and nutrients. The energy to the organism is supplied through food. The intake food helps to perform all the activities and also develops the immunity to fight against infectious diseases.
ans2.) saprotrophs:- are orgnisms that obtain nutrition from dead and decaying organic matter. Examples: Fungi and some bacteria.
Parasites:- are organisms that depend upon another organism (host) for food and cause harmful effects or dieseases to the host. Examples: Cuscuta (Amarbel), mosquitoes and head lice.
ans3.) Presence of starch in leaves can be tested by iodine test. Iodine turns starch solution into blue-black colour. Pour few drops of dilute iodine solution on the boiled leaf. The leaf becomes blue-black which proves the presence of starch in it.
ans4.) The process of synthesis of food in green plants is called photosynthesis. This process takes place in the cells containing the green pigment chlorophyll. ... During photosynthesis, chlorophyll containing cells of leaves, in the presence of sunlight, use carbon dioxide and water to synthesise carbohydrates.
ans5.) Leaves are the food factories of the plants which capture the energy of the sunlight with the help of chlorophyll. ... Show with the help of a sketch that the plants are the ultimate source of food. Answer. The food chain shows that the plant is the ultimate producer.
diagram is above...
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