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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
विकल्प
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
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Which of the following constitute a food-chain?
Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
Which organisms belong to third and fourth trophic levels in the food chain comprising the following?
Rats, Plants, Hawk, Snakes
A food chain represents a unidirectional flow of X. What is X?
Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
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 :
Pesticides enter the food chain at the ...........level
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Explain how harmful chemicals enter our bodies.
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 percentage of sun's energy falling on the leaves of green plants is utilised by the plants in the process of photosynthesis and stored as chemical energy of food?
(a) 99 per cent
(b) 10 per cent
(c) 1 per cent
(d) 20 per cent
Green plants utilize ______ percent of sun’s energy to prepare their food by the process of photosynthesis.
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
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
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
Primary consumers are characterized as:
