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प्रश्न
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
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उत्तर
Biomagnification is the process by which a harmful chemical enters the food chain and gets concentrated at each trophic level.
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संबंधित प्रश्न
What will be the amount of energy available to the organisms of the 2nd trophic level of a food chain if the energy available at the first trophic level is 10,000 joules?
The first trophic level in a food chain is always a green plant. Why ?
What will happen if we kill all the organisms in one trophic level?
In the following food chain, plants provide 500 J of energy to rats. How much energy will be available to hawks from snakes?
Plants → Rats → Snakes → Hawks
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain
Write down a food chain with five links in it.
At which trophic level a person is feeding when he is eating bread.
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?
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 two predators of snakes in a food web operating in a forest ecosystem.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
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
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.
Which of the following is an autotroph?
Each level in the food chain is called a ______ level.
Differentiate between herbivores and carnivores.
