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प्रश्न
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
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उत्तर
If all the lions are removed from the above food chain, the population of deer will increase greatly, as there will be no lion to consume them as food. Also, the density of grass will decrease as the high population of deer will lead to excessive grazing of grass.
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संबंधित प्रश्न
Which of the following are always at the second tropic level of food chains?
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
Which of the following constitute a food-chain?
Which of the following belong to the same trophic level?
Tree ; Frog ; Snake ; Grass ; Lizard
What is the role of decomposers in the ecosystem?
What is a trophic level?
Give one example of a simple food chain.
One of the following is a micro-consumer. This one is :
(a) ant
(b) lice
(c) fungi
(d) mosquito
In the food chain comprising of a snake, grass, insect, and frog, the secondary consumer is :
(a) insect
(b) snake
(c) frog
(d) grass
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
Consider the following food chain
(i) Plants → Mice → Snakes → Hawks
(ii) Plants → Mice →Hawks
If energy available at the producer level in both the food chains is 100 J, in which case will hawks get more energy as food and by how much? Justify your answer.:
The ten per cent law is associated with
(a) transfer of energy from various trophic levels to decomposers in a food chain
(b) transfer of ATP energy into muscular energy
(c) transfer of chemical energy from one organism to another
(d) transfer of sun's energy to the organisms called producers.
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
Write the food chain comprising all the organisms mentioned above.
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
Which other organism you could write in place of bird in the above food chain?
Arrange the following in a correct sequence and form a food chain
Rabbit → Carrot → Eagle → Snake
In the given food chain, suppose the amount of energy at the fourth trophic level is 5 kJ, what will be the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
In the following food chain, only 2J of energy was available to the peacocks. How much energy would have been present in Grass? Justify your answer.
GRASS → GRASS HOPPER → FROG → SNAKE → PEACOCK
Which statement is correct with respect to the food chain?
Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:
- Name the type of ecosystems that exist in food chains (b) and (c).
- The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
- Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.
