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प्रश्न
At which trophic level a person is feeding when he is eating roasted chicken.
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उत्तर
Third trophic level.
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संबंधित प्रश्न
In a food chain of frog, grass, insect and snake, assign trophic level to frog.
List two biotic components of a biosphere.
Why are green plants called producers?
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Why are plants called producers?
The following statement is true or false :
Secondary consumers and tertiary consumers, both are carnivores.
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
Write a common food chain of a pond ecosystem having four links.
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
Which of the following is an autotroph?
Each level in the food chain is called a ______ level.
Define – Heterotrophs.
Differentiate between herbivores and carnivores.
DDT was sprayed in a lake to regulate breeding of mosquitoes. How would it affect the trophic levels in the following food chain associated with a lake? Justify your answer.
Assertion (A): The energy which passes to the herbivores does not come back to autotrophs.
Reason (R): The flow of energy in a food chain is unidirectional.
Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.
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.
