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प्रश्न
Distinguish between a food chain and a food web.
Differentiate between a food chain and a food web.
Give two differences between food chain and food web.
What is difference between food chain and food web?
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उत्तर
| Sr. No. | Food chain | Food web |
| i. | The food chain is a definite sequence of interactions between producers, consumers, and decomposers (saprophytes). | The food web is a network of food chains that are interconnected at various levels, forming an intricate web instead of a linear chain. |
| ii. | If any of the intermediate organisms are removed from the chain, it affects the whole food chain. | In the food web, there is more than one alternative food source for most of the organisms; hence, the removal of an organism does not affect the food web directly. |
| iii. | Members of higher trophic levels feed on a single species of organism. | A single organism can consume many sorts of organisms. |
| iv. | In the food chain, energy flow may be easily quantified. | In a food web, calculating energy flow is complicated. |
| v. | Members of the same trophic level compete with one another. | Members of the same as well as distinct trophic levels compete. |
Notes
Students should refer to the answer according to their questions.
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संबंधित प्रश्न
Give diagrammatic representation of pyramid of numbers.
In an ecosystem dominated by trees, the pyramid (of numbers) is ______ type.
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Give an example of an ecosystem that shows an inverted pyramid of biomass.
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Which one of the following is not used for construction of ecological pyramids?
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
Pyramid of biomass in terrestrial ecosystem shows sharp decline in
Which of the following statements is not correct?
Name any two organisms which can occupy more than one trophic level in an ecosystem.
The number of trophic levels in an ecosystem are limited. Comment.
Write a short note on pyramid of numbers and pyramid of biomass.
(a) Given below is a pyramid of biomass in an ecosystem where each bar represents the standing crop available in the trophic level. With the help of an example explain the conditions where this kind of pyramid is possible in nature.
(b) Will the pyramid of energy be also of the same shape in this situation? Give a reason for your response.
(a) Draw a pyramid of numbers where a large number of insects are feeding on the leaves of a tree. What is the shape of this pyramid?
(b) Will the pyramid of energy be also of the same shape in this situation? Give a reason for your response.
A graphic representation of the biomass relationship between the producer and consumer in an ecosystem is called ______.
What does the apex of each ecological pyramid represent?
What does a pyramid of numbers represent?
Which combination can produce an inverted pyramid of numbers?
What does a pyramid of biomass represent?
Which ecosystem shows an inverted biomass pyramid?
What does a pyramid of energy represent?
Which statement expresses the general pattern of energy across trophic levels?
Which statement is a limitation of ecological pyramids?
Which organisms are not included in ecological pyramids even though they play a vital role in the ecosystem?
When is a sparrow a secondary consumer?
