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Question
Why do organisms need to take food?
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Solution
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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RELATED QUESTIONS
What moves the food in the digestive organs?
Define saprophytic nutrition. Give one example.
Define parasite. name two parasites.
Describe the process of nutrition in Amoeba. Draw labelled diagrams to show the various steps in the nutrition in Amoeba.
The process of obtaining food by Amoeba is known as:
(a) dialysis
(b) cytokinesis
(c) phagocytosis
(d) amoebiasis
The organism having parasitic mode of nutrition is:
(a) Penicillium
(b) Plasmodium
(c) Paramecium
(d) Parrot
One of the following organisms has a saprophytic mode of nutrition. This organism is:
(a) mushroom
(b) malarial parasite
(c) leech
(d) lice
Which of the following is an incorrect statement?
(a) energy is essential for life processes
(b) organisms grow with time
(c) movement of molecules does not take place among cells
(d) organisms must repair and maintain their body
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) | Heterotroph |
| (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.
