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प्रश्न
Why do organisms need to take food?
उत्तर
Food is needed by all organisms for many purposes:
- The main function of food is to help in growth.
- Food provides energy for movements such as running, walking or raising our arms.
- Food is also needed for replacement and repairing damaged parts of the body.
- Food gives us resistance to fight against diseases and protects us from infections.
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संबंधित प्रश्न
Match the items given in Column I with those in Column II:
| Column I | Column II |
| Chlorophyll | Bacteria |
| Nitrogen | Heterotrophs |
| Amarbel | Pitcher plant |
| Animals | Leaf |
| Insects | Parasite |
What moves the food in the digestive organs?
Define saprophyte. Name two saprophytes.
Define parasite. name two parasites.
What are the different modes of nutrition? Explain with one example of each mode of nutrition.
Name the mode of nutrition in Plasmodium.
There are four organisms A, B, C and D. The organism A eats only the flesh of other animals as food. The organism B can eat grains, fruits and vegetables as well as meat and fish. The organism C can make the food itself from simple inorganic substances present in the environment by utilising sunlight energy. On the other hand, organism D eats only plants and their products as food.
(a) Which organism is (i) omnivore (ii) herbivore, and (ii) carnivore?
(b) Which organism is an autotroph?
(c) Which organism is/are heterotroph(s)?
(d) Which organism can be a producer?
(e) Which organism is/are consumer (s)?
(f) Give one example each of organisms which could be like (i) A (ii) B (iii) C, and (iv) D
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 |
Name the type of nutrition exhibited by Amoeba. Explain how food is taken in and digested by this organism.
