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What is Meant by a Primary Consumer, Secondary Consumer and a Tertiary Consumer? Give One Example of Each. - Science

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प्रश्न

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

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उत्तर

Herbivores that feed on plants are called primary consumers. Example: Insects.
Small carnivores that feed on other animals, especially herbivores, are called secondary consumers. Example: Frogs.
Large carnivores that feed on other animals, especially secondary consumers, are called tertiary consumers. Example: Birds.

             Insects → Frogs → Birds
(Primary consumers)       (Secondary consumers)         (Tertiary consumers)

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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 22 | पृष्ठ २२६

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

State with reason any two possible consequences of elimination of decomposers from the Earth.


"Energy flow in a food chain is unidirectional" Justify this statement.


In a food chain of frog, grass, insect and snake, assign trophic level to frog.


Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants


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


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 which ends with humans.


What is a 'food web'? Show its formation.


If a grasshopper is eaten by a frog, then the energy transfer will be from ______.


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.

Which organisms are (i) predators, and (ii) prey?


Match the terms given in column I with the terms given in column II and column III having the same meaning :

Column I Column II Column III
(1) Secondary consumer Herbivore 1st trophic level
(2) Primary consume Autotroph 3rd trophic level
(3) Producer Carnivore 4th trophic level
(4) Tertiary consumer Large carnivore 2nd trophic level

Name two predators of snakes in a food web operating in a forest ecosystem.


What does garbage consist of?


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 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.
(a) In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?


"Energy flow in food chains is always unidirectional". Justify this statement. Explain how the pesticides enter a food chain and subsequently get into our body.

 

 

We should reduce the use of the plastic bags, bottles etc. because ______.


Which of the following is an autotroph?


Define – Heterotrophs.


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