हिंदी

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

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प्रश्न

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

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उत्तर

1 per cent
Only one per cent of the sun's energy falling on the leaves of green plants is utilised by the plants in the process of photosynthesis and stored as the chemical energy of food.

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अध्याय 5: Our Environment - Exercise 2 [पृष्ठ २४२]

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लखमीर सिंग Biology Part 3 [English] Class 10
अध्याय 5 Our Environment
Exercise 2 | Q 43 | पृष्ठ २४२

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संबंधित प्रश्न

The following statement is true or false :

Secondary consumers and tertiary consumers, both are carnivores.


Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat

 

What is the role of decomposers in the ecosystem?


What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.


Write down a food chain in the sea.


The decomposers in an ecosystem ______.


Which of the following is not a producer?
(a) grass
(b) zooplankton
(c) phytoplankton
(d) paddy


The sea water contains water beetles, tadpole, fish and weeds.

Write a food chain comprising all the given organisms.

 


The following is a food chain that ends with human :

How does this food chain differ form a usual food chain involving human such as : plants → goat → human?


'If we excessively use pesticides to protect the crops from diseases, then it may cause long-term  damage to mankind'. Justify this statement.


Will the levels of biological magnification be different at different levels of the ecosystem?


Explain why, the flow of energy in the ecosystem is said to be unidirectional.


An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is :
(a) water beetles
(b) tadpoles
(c) weeds
(d) fish


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.

Which other organism you could write in place of bird in the above food chain?


Green plants utilize ______ percent of sun’s energy to prepare their food by the process of photosynthesis.


Which of the following is an autotroph?


What are autotrophs? 


Define – Heterotrophs.


Which statement is correct with respect to the food chain?


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