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प्रश्न
Name the type of nutrition exhibited by Amoeba. Explain how food is taken in and digested by this organism.
उत्तर
The digestive system differs in various organisms. In single-celled organisms, the entire surface may take in food. But as the organism's complexity increases, different parts become specialised to perform other functions. Amoeba takes in food using temporary finger-like extensions of the cell surface, which fuse over the food particle, forming a food vacuole. In the food vacuum, complex substances are broken down into simpler ones and diffused into the cytoplasm. The remaining undigested material is moved to the cell's surface and thrown out. In Paramoecium, a unicellular organism, the cell has a definite shape, and food is taken in at a specific spot. Food is moved to this spot by the movement of cilia, which cover the entire cell surface.
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संबंधित प्रश्न
Why do organisms need to take food?
What is the mode of nutrition in fungi?
Name one organism each having saprophytic, parasitic and holozoic modes of nutrition.
Define nutrition.
Name the mode of nutrition in Plasmodium.
What is the process of obtaining food by Amoeba called? What does it mean?
The organism having parasitic mode of nutrition is:
(a) Penicillium
(b) Plasmodium
(c) Paramecium
(d) Parrot
The organisms A, B and C can obtain their food in three different ways. Organism A derives its food from the body of another living organism which is called its D, without killing it. The organism B takes in the solid food by the process of ingestion, digests a part of this food and throws out undigested food in the process called E. The organism C obtains its food from dead and decaying plants.
(a) What is the mode of nutrition of (i) organism A (ii) organism B, and (iii) organism C?
(b) What is the organism like D called?
(c) Name the process E.
(d) Give one example each of organisms like (i) A (ii) B, and (iii) C.
(e) What is the general name of three modes of nutrition exhibited by organisms A, B and C?
Match the organisms given in Column I with their mode of nutrition given in Column II.
| Column 1 | Column II | ||
| (a) | Mango tree | (i) | Insectivorous plant |
| (b) | Mushroom | (ii) | Heterotrop |
| (c) | Pitcher plant | (iii) | Autotroph |
| (d) | Cuscuta | (iv) | Saprophyte |
| (e) | Elephant | (v) | Parasitic |
Can you give me a name?
Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.
I live in water; people keep me in an aquarium and feed me. ______, ______
