ecology & bio environment geography section 2 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 26 [SCC CGL 2011]

An artificial ecosystem is represented by :

a) aquarium

b) agricultural land

c) zoo

d) pisciculture tank

Answer: (a)

An artificial ecosystem is one created by people. You can create an artificial ecosystem in an aquarium or terrarium. Nathaniel Bagshaw Ward is credited as the inventor of the terrarium, which he accidently created in 1829.

Question : 27 [SCC CGL 2011]

Which is the most stable ecosystem?

a) Forest

b) Ocean

c) Mountain

d) Desert

Answer: (b)

An ecosystem can be natural or man-made, large or small, permanent or temporary, complete or incomplete. Natural ecosystem.

It is an ecosystem developed under natural conditions without any appreciable human interference. A natural ecosystem can be terrestrial (e.g., forest, desert, grassland) or aquatic (e.g., freshwater, lake, pond, river, sea). Oceans constitute the most stable ecosystem.

Question : 28 [SCC LDEO 2011]

Man can maintain an ecological balance in the biosphere by

a) understanding the delicate balance in the relative number of organisms

b) developing new breeds of cultivated plants and domesticated animals

c) using insecticides and pesticides

d) deforestation

Answer: (a)

Ecological balance is a state of dynamic equilibrium within a community of organisms in which genetic, species and ecosystem diversity remain relatively stable, subject to gradual changes through natural succession.'

In other words, it refers to a stable balance in the numbers of each species in an ecosystem. So to maintain this balance, the delicate balance between the organisms constituting an ecosystem should be understood.

Question : 29 [SCC CGL 2014]

Species which has restricted distribution is called

a) Allopatric

b) Endemic

c) Sympatric

d) Eco species

Answer: (b)

Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type. Species found in such restricted geographical area are called endemic species.

Question : 30 [SCC LDEO 2012]

What is the percentage coverage of Tropical Forest on earth’s landmass ?

a) 25

b) 12

c) 17

d) 7

Answer: (d)

Although tropical forests cover less than 7% of the earth’s surface they are home to approximately 50% of all living things on earth.

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1002 Ecology & Bio geography based indian geography mcq section 2 question answer with explanation pdf

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