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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.
Explanation:
Only about 1% of the solar energy falling on plants is captured by autotrophs (green plants) through photosynthesis. Of the energy stored at one trophic level, only about 10% is transferred to the next trophic level.
Therefore, 10% refers to the transfer of energy from one trophic level to the next, not to the solar energy received from the Sun.
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संबंधित प्रश्न
Which of the following constitute a food-chain?
Why are plants called producers?
What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
Which of the following statement is incorrect?
The sea water contains water beetles, tadpole, fish and weeds.
- Write a food chain comprising all the given organisms.
- Which organisms in the food chain are (i) herbivore, and (ii) carnivores?
- Which organisms are (i) predators, and (ii) prey?
- Which organisms can trap solar energy to make food?
- Which organism is a secondary consumer?
The following is a food chain that ends with human :
plants → bee → human
How do bees provide food for humans?
What would happen to the number of rabbits and grass plants if the number of foxes increased?
What would happen to the number of rabbits and grass plants if the number of foxes decreased?
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
In the food chain given below, if the amount of energy available at fourth trophic level is 5 kJ, what was the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
(a) 500 kJ
(b) 50 kJ
(c) 5000 kJ
(d) 5 kJ
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
The ten per cent law is associated with
(a) transfer of energy from various trophic levels to decomposers in a food chain
(b) transfer of ATP energy into muscular energy
(c) transfer of chemical energy from one organism to another
(d) transfer of sun's energy to the organisms called producers.
A forest ecosystem having a lot of green plants has some foxes, lions and rabbits in it.
(a) Write a food chain comprising all the four organisms mentioned above.
(b) Name (i) one herbivore, and (ii) two carnivores, in this food chain.
(c) Name the link which is a predator as well as a prey.
(d) Name (i) second trophic level, and (ii) third trophic level.
(e) Which link of this food chain can feed on second trophic level as well as third trophic level, independently?
(f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.
| A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high. |
- In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
- Which organism will have the maximum amount of pesticides accumulated through the food chain? What is this process known as?
- Write the food chain comprising all the organisms mentioned above.
- Which other organism you could write in place of bird in the above food chain?
Primary consumers that eat plants are called _______.
Which of the following is an autotroph?
If a harmful chemical enters a food chain comprising peacocks, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body? Justify your answer. Name the process involved and define it.
In the food chain Grass → Insects → Thrush → Sparrow Hawk, what is the trophic level of the thrush?
