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प्रश्न
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
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उत्तर
dichlorodiphenyltrichloroethane
The harmful pesticide that accumulates in the bodies of human beings through the food chain, through a process known as biomagnification, is dichlorodiphenyltrichloroethane (DDT).
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संबंधित प्रश्न
Which of the following are always at the second tropic level of food chains?
What is biological magnification?
Why are plants called producers?
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
What is the role of decomposers in the ecosystem?
Write a common food chain of a pond ecosystem having four links.
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 |
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute the ______.
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
Some hunters are roaming in the plush green forest of Africa. They spot a deer and kill it. They decide to roast the deer there and then and eat it. When the hunters had just finished enjoying the feast of roasted deer, a lion attacks them. The lion kills one of the hunters and eats his flesh.
(a) write a food chain which provides food to lion in this case.
(b) Which animal (other than deer) the lion could look for food if he did not get the hunter as prey?
(c) Which other animal in the forest could have been in place of lion?
(d) How does the above food chain differ form the food chain such as : plants → goat → man?
Give one example of a food chain having four organisms. Below each organism write the three appropriate terms from the part (a) above which you think it represents.
Fill in the following blank with suitable word :
Plants → Antelope → ............
What does garbage consist of?
Bacteria and fungi are called decomposers.
Arrange the following in a correct sequence and form a food chain
Rabbit → Carrot → Eagle → Snake
Give one example of a food chain in an aquatic ecosystem?
Which of the following is an autotroph?
