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प्रश्न
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
पर्याय
eutrophication
pollution
biomagnification
accumulation
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उत्तर
biomagnification
Explanation -
Biomagnification is the phenomenon through which certain pollutants such as non-biodegradable pesticides get accumulated in tissues in increasing concentration at successive trophic levels along the food chains.
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संबंधित प्रश्न
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
What name has been given to those organisms which break down the complex organic compounds present in dead animals and plants?
Which category of organisms forms the starting point of a food chain?
Write an aquatic food chain.
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
Explain the term ‘producer’.
Can the organisms of any trophic level be removed without causing any damage to the ecosystem? Will the impact of removing all the organisms in a trophic level be different for different trophic levels?
A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.
(a) Construct a food chain for the pond.
(b) How many links are there in this chain?
Write a common food chain of a pond ecosystem having four links.
The following is a food chain that ends with human :
plants → bee → human
How do bees provide food for humans?
If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain?
Plants → Goat → Lion
Why are there rarely more than five links (or five organisms) in a food chain?
Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for trasnsfer to the next higher trophic level.
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
What are decomposers? What will be the consequence if the decomposers are completely eradicated from an ecosystem? Give justification in support of your answer.
If 100 J energy is available at the producer level in a food chain then the energy available to the secondary consumer will be ______.
Natural agents like ______ are the decomposition factors breaking complex forms into simpler units.
Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:
- Name the type of ecosystems that exist in food chains (b) and (c).
- The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
- Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.
