Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.

Academic Biology NCERT Class 10

Biological Magnification is the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.

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Updated on: 18-Jan-2023

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Which of the following limits the number of trophic levels in a food chain?(a) insufficient food supply from producer level(b) decrease in energy at higher trophic levels(c) increase in the number of organisms at higher trophic levels(d) accumulation of harmful chemicals at higher trophic levels
If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?
What is meant by trophic level in a food chain? Construct a terrestrial food chain with four trophic levels. The energy flow in a food chain is always unidirectional. Why?
What percentage of energy available at the producer level is transferred at successive trophic levels in a food chain?
(a) Define trophic level. Draw the food chain with four trophic levels.(b) What will happen if we kill all the organisms in one trophic level?
A forest ecosystem having a lot of green plants has some foxes, lions and rabbits in it.(a) Write a food chain comprising all the four organisms mentioned above.(b) Name (i) one herbivore, and (ii) two carnivores, in this food chain.(c) Name the link which is a predator as well as a prey.(d) Name (i) second trophic level, and (ii) third trophic level.(e) Which link of this food chain can feed on second trophic level as well as third trophic level, independently?(f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.
In a food chain of frog, grass, insect, and snake, assign trophic level to frog.
Construct A Terrestrial Food Chain Comprising Four Trophic Levels. (b) What Will Happen If We Kill All the Organisms in One Trophic Level? (c) Calculate The Amount of Energy Available to The Organisms at The Fourth Trophic Level If the Energy Available to The Organisms at The Second Trophic Level Is 2000 J.
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as :(a) eutrophication (b) pollution (c) biomagnification (d) accumulation
Which of the following are always at the second trophic level of food chains?Carnivores, Autotrophs or Herbivores.
In a food chain, the third trophic level is always occupied by :(a) carnivores (b) herbivores (c) decomposers (d) producers
Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute the :(a) ecosystem (b) food web (c) ecological pyramid b> (d) food chain
The harmful chemical which is accumulating in human beings through food chain is :(a) benzene hexachloride (b) dichlorodiphenyltrichloroethane(c) chlorofluorocarbon (d) abscisic acid
(a) Match the terms given in column I with the terms given in column II and column III having the same meaning :Column IColumn IIColumn III(i) Secondary consumerHerbivore1st trophic level(ii) Primary consumerAutotroph3rd trophic level(iii) ProducerCarnivore4th trophic level(iv) Tertiary consumerLarge carnivore2nd trophic level(b) 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.
State whether the following statement is true or false :Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.

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