Tag: ecology and ecosysytem

Questions Related to ecology and ecosysytem

How many of the following will act as a decomposer in a pond ecosystem?
[spider, earthworm, woodlouse, fungus]

commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. One

  2. Two

  3. Three

  4. Four

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Correct Option: B
Explanation:

Decomposers are the organisms which feed on dead organisms such as microbes. Spider feeds on other insects and acts as a predator and woodlouse found in forest and feeds on plant matter from the forest floor. Whereas earthworm and fungus can grow in pond water and feeds on dead organisms (plant or animal).

So, the correct answer is 'Two'.

Ecosystem can be recognised as self-regulating and self sustaining unit of

commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. Species

  2. Landscape

  3. Organism

  4. Community

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Correct Option: B
Explanation:

An ecosystem is a community of living organisms together with non-living components of their environment, functioning together as a system. The term 'ecosystem' was first proposed by Sir Arthur Tansley in 1935. The ecosystem can be recognized as a self-regulating and self-sustaining unit of 'landscape'. Hence, the correct answer is option B. ''landscape'.

Which of the following ecosystem lacks one or more structural components?

commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. Deep sea

  2. Freshly formed water pond

  3. Forest ecosystem

  4. All of the above

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Correct Option: A
Explanation:

(A) In deep sea ecosystem has all structural components,

(B) Freshly formed water pond lacks many abiotic components or structural components like atmospheric condition and water resources are absent.
(C) In Forest ecosystem all structural components are present
Thus, the correct answer is 'Freshly formed water pond.'

Study of interaction between living organisms and environment is called

commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. Ecosystem

  2. Phytogeography

  3. Psychology

  4. Mycology

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Correct Option: A
Explanation:

The ecosystem is defined as the study of the interaction between the living organisms and the environment.

So, the correct answer is 'Ecosystem'.

Which of the following is non-essential in an ecosystem:-

evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. $Co _2$

  2. Grass

  3. soil

  4. Fungi

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Correct Option: D
Explanation:
Fungi are saprophytes, i.e they absorb nourishment from dead and decaying organisms.
They belong to the detritus cycle which includes bacteria and other microorganisms. So do not form the essential component of the ecosystem
So, the correct answer is 'Fungi'

A drop of water is an example of :- 

commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. Micro ecosystem

  2. Macro ecosystem

  3. Nano ecosystem

  4. Both B & C

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Correct Option: C
Explanation:
A drop of water is an example of nano ecosystem. Nano-ecosystems are smaller ecosystems that are specially contained within larger ecosystems but have individual characteristics. It is part of mega ecosystem. 
So, the correct option is 'macro ecosystem'.

The ocean covers ___________ percentage of Earth's surface.

commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. 51%

  2. 61%

  3. 71%

  4. 91%

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Correct Option: C

The abiotic and biotic components constitute the structure of an

evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. energy flow

  2. environment

  3. atmosphere

  4. Ecosystem

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Correct Option: D

The inherent ability of organisms to reproduce and multiply is called

evs - i issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. C value

  2. biotic potential

  3. carrying capacity

  4. K value

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Correct Option: B

Definition of ecosystem is

commercial applications issues of the environment eco-system and its destruction ecology and ecosystem ecology and ecosysytem

  1. The community of organisms together with the environment in which they live

  2. The abiotic component of a habitat

  3. The part of the earth and its atmosphere which inhibits living organisms

  4. A community of organisms interacting with one another

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Correct Option: A