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प्रश्न
Which of the following constitute a food-chain?
पर्याय
Grass, wheat and mango
Grass, goat and human
Goat, cow and elephant
Grass, fish and goat
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उत्तर
Grass, goat and human
Explanation:
Grass is eaten by goats, and goats are eaten by humans. Grass, goat and human serve as various trophic levels of a food chain as shown below:
\[\ce{\underset{(Producer)}{Grass} -> \underset{(Herbivore)}{Goat} -> \underset{(Omnivore)}{Human}}\]
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संबंधित प्रश्न
"Energy flow in a food chain is unidirectional" Justify this statement.
List two main components of ecosystem?
List two important roles play in the environment by decomposers.
In the following food chain, 20,000 J of energy was available to the plants. How much energy would be available to man in this chain?
Plants → Sheep → Man
What are planktons?
Which category of organisms forms the starting point of a food chain?
Which organisms belong to third and fourth trophic levels in the food chain comprising the following?
Rats, Plants, Hawk, Snakes
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
Define decomposers.
What will happen if we kill all the organisms in one trophic level?
Write a common food chain of a pond ecosystem having four links.
What is a 'food web'? Show its formation.
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 |
In the food chain comprising of a snake, grass, insect, and frog, the secondary consumer is :
(a) insect
(b) snake
(c) frog
(d) grass
What would happen to the number of grass plants and foxes if the number of rabbits increased?
Fill in the following blank with suitable word :
Grass → ........... → Human
Calculate the amount of energy that will be available to big fish in the following food chain, if 10,000 J of energy is available to small algae from the sun :
Small algae → Zooplankton → Fish → Big fish
Analogy:
Primary Consumer: Goat, Cow:: Secondary Consumer: ______.
If a harmful chemical enters a food chain comprising peacocks, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body? Justify your answer. Name the process involved and define it.
Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.
