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प्रश्न
At which trophic level a person is feeding when he is eating fish.
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उत्तर
Fourth trophic level.
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संबंधित प्रश्न
"Energy flow in a food chain is unidirectional" Justify this statement.
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
Construct a short foodchain, ending with man.
Give one example of a simple food chain.
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 |
The decomposers in an ecosystem ______.
Which of the following statement is incorrect?
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?
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
The following is a food chain that ends with human :
Do you think that the food chain given in this question can really be regarded as a food chain? Explain your answer.
What would happen to the number of rabbits and grass plants if the number of foxes decreased?
Why are there rarely more than five links (or five organisms) in a food chain?
What is ten per cent law? Explain with an example.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
In the food chain given below, if the amount of energy available at fourth trophic level is 5 kJ, what was the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
(a) 500 kJ
(b) 50 kJ
(c) 5000 kJ
(d) 5 kJ
A food chain comprises of cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be :
(a) cat
(b) plants
(c) dog
(d) seed-eating bird
Your mother always thought that fruit juices are very healthy for everyone. One day she read in the newspaper that some brands of fruit juices in the market have been found to contain certain level of pesticides in them. She got worried as pesticides are injurious to our health.
(a) How would you explain to your mother about fruit juices getting contaminated with pesticides?
(b) It is said that when these harmful pesticides enter our body as well as in the bodies of other organisms they get accumulated and beyond a limit cause harm and damage to our organs. Name the phenomenon and write about it.
Bacteria and fungi are called decomposers.
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
