Please select a subject first
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Construct a short foodchain, ending with man.
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Write a common food chain of a pond ecosystem having four links.
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Give two differences between food chain and food web.
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Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
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Write one or two word for the following statement/definition :
Organisms which depend on the producers for food either directly or indirectly
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Give one example of a simple food chain.
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What is a 'food web'? Show its formation.
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In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic
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Which of the following represents a possible food chain found in a pond :
| Primary producers |
Primary consumers | Secondary consumers |
| (a) green algae | fish | mosquito larvae |
| (b) fish | green algae | mosquito larvae |
| (c) mosquito larvae | fish | green algae |
| (d) green algae | mosquito larvae | fish |
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Which of the following are decomposers of dead organisms?
| Bacteria | Fungi | Viruses |
| (a) no | yes | yes |
| (b) yes | no | yes |
| (c) yes | yes | no |
| (d) yes | yes | yes |
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In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
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If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
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The decomposers in an ecosystem ______.
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What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
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Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.
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Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute the ______.
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Which of the following statement is incorrect?
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Which of the following group of organisms are not constituents of a food chain?
- grass, lion, rabbit, wolf
- plankton, man, fish, grasshopper
- wolf, grass, snake, tiger
- frog, snake, eagle, grass, grasshopper
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In the figure given alongside, the various trophic levels are shown in the form of a pyramid. At which trophic level the maximum energy is available?
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