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प्रश्न
Differentiate between an autotroph and a heterotroph
उत्तर
The difference between autotrophs and heterotrophs is given below :
| Sr No. | Autotrophs | Heterotrophs |
| 1. | Some organisms such as plants make their own food from simple substances. They are autotrophs and the mode of nutrition is known as autotrophic nutrition. | Organisms that depend on plants or autotrophs for food are called heterotrophs and the mode of nutrition is known as heterotrophic nutrition. |
| 2. | Autotrophs are called producers as they make food required by all other organisms. | Heterotrophs are called consumers as they consume food prepared by autotrophs. |
| 3. | In a food chain, autotrophs make up the first trophic level. | Heterotrophs form the next trophic levels after plants in the food chain. |
| 4. | Plants, algae and some bacteria are autotrophs. | Most animals, fungi and some bacteria are hetertrophs. |
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संबंधित प्रश्न
Give a brief description of the process of synthesis of food in green plants.
Name the process by which plants make food.
Apart from carbon dioxide and water, name four other raw materials which are needed by the plants.
How does carbon dioxide from the air enter the leaves of a plant to be used in photosynthesis?
What is photosynthesis?
Name the raw materials required for photosynthesis. How do plants obtain these raw materials?
When carrying out the starch test on a leaf, why is it important to boil the leaf in alcohol?
(a) to dissolve the waxy cuticle
(b) to make the cells more permeable to iodine solution
(c) to remove the chlorophyll
(d) to stop chemical reactions in the cells.
The internal energy (cellular energy) reserve in autotrophs is:
(a) proteins
(b) fatty acids
(c) glycogen
(d) starch
An organism A which cannot move from one place to another, makes a simple food B from the substances C and D available in the environment. This food is made in the presence of a green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. The food H gives a blue-black colour with dilute iodine solution.
(a) What is (i) organism A (ii) food B, and (iii) food H?
(b) What are C and D?
(c) Name (i) green coloured substance E, and (ii) organ F.
(d) What is the process G?
Which of the following statements about the autotrophs is incorrect?
