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Which Organisms Belong to Third and Fourth Trophic Levels in the Food Chain Comprising the Following? Rats, Plants, Hawk, Snakes - Science

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प्रश्न

Which organisms belong to third and fourth trophic levels in the food chain comprising the following?
Rats, Plants, Hawk, Snakes

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उत्तर

Snakes belong to the third trophic level and hawks belong to the fourth trophic level in the food chain.

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पाठ 5: Our Environment - Exercise 1 [पृष्ठ २२६]

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लखमीर सिंह Biology (Science) [English] Class 10
पाठ 5 Our Environment
Exercise 1 | Q 16 | पृष्ठ २२६

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संबंधित प्रश्‍न

Give reason to justify the following: Flow of energy in a food chain is unidirectional.


"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?


The following statement is true or false :
 In biology, human beings are called producers.


Fill in the following blank with suitable word :

In nature, all green plants are............ whereas animals are consumers.


Can the organisms of any trophic level be removed without causing any damage to the ecosystem? Will the impact of removing all the organisms in a trophic level be different for different trophic levels?


Write down a food chain with five links in it.


At which trophic level a person is feeding when he is eating apple.


Construct a long food chain.


What will happen if deer is missing in the food chain given below?

Grass → Deer → Tiger


A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y

Name one phytoplankton.


Why are there rarely more than five links (or five organisms) in a food chain?


Fill in the following blank with suitable word :

Pesticides enter the food chain at the ...........level


What is ten per cent law? Explain with an example.


Calculate the amount of energy that will be available to big fish in the following food chain, if 10,000 J of energy is available to small algae from the sun :
Small algae → Zooplankton → Fish → Big fish


The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid


The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
(a) What could organisms X be?
(b) Write a food chain comprising of all the four organisms mentioned.
(c) What is the general name of the food chains like the one written above?
(d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain.
(e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer?


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.


What are decomposers? What will be the consequence if the decomposers are completely eradicated from an ecosystem? Give justification in support of your answer.


Natural agents like ______ are the decomposition factors breaking complex forms into simpler units.


What is Autotrophs?


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