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प्रश्न
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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उत्तर
False. Only one per cent of light energy is trapped by plants, and of this, only 10 per cent is transferred at each trophic level in a food chain.
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संबंधित प्रश्न
Which of the following are always at the second tropic level of food chains?
What are planktons?
Which category of organisms forms the starting point of a food chain?
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
Fill in the following blank with suitable word :
Decomposer organisms are..........in their action.
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
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?
The sea water contains water beetles, tadpole, fish and weeds.
Which organism is a secondary consumer?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name the organism which Y could be.
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Explain why, a food chain usually cannot have more than three or four steps.
Primary consumers that eat plants are called _______.
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
What would happen if an organism is removed from the food chain?
Green plants utilize ______ percent of sun’s energy to prepare their food by the process of photosynthesis.
A food chain comprising birds, green plants, fish and man. The concentration of harmful chemical entering the food chain will be maximum in ______.
Animals that eat both plants and animals are called as Carnivores.
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.
