Advertisements
Advertisements
Question
If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to : tertiary consumer?
(a) 15 J
(b) 10 J
(c) 1.50 J
(d) 0.15 J
Advertisements
Solution
1,000 J
According to the 10 per cent law, only 10 per cent of the energy available in one trophic level is transferred to the next trophic level.
APPEARS IN
RELATED QUESTIONS
In a food chain of frog, grass, insect and snake, assign trophic level to frog.
Write an aquatic food chain.
A food chain represents a unidirectional flow of X. What is X?
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 |
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Which organism in the above food chain is a (1) primary consumer, and (2) tertiary consumer?
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
How much energy will be available to hawks in the food chain comprising hawk, snake, paddy and mice, if 10,000 J of energy is available to paddy from the sun?
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
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 organism will have the maximum amount of pesticides accumulated through the food chain? What is this process known as?
A food chain comprising birds, green plants, fish and man. The concentration of harmful chemical entering the food chain will be maximum in ______.
Define – Heterotrophs.
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
Which group of organisms are not constituents of a food chain?
- Grass, lion, rabbit, wolf
- Plankton, man, fish, grasshopper
- Wolf, grass, snake, tiger
- Frog, snake, eagle, grass, grasshopper
In the following food chain, vertical arrows indicate the energy lost to the environment and horizontal arrows indicate energy transferred to the next trophic level. Which one of the three vertical arrows (A, C and E) and which one of the two horizontal arrows (B and D) will represent more energy transfer? Give reason for your answer.
A food chain in a forest ecosystem
