Ecosystems (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 22 - 27 of 28

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Question number: 22

» Ecosystems » Structure and Functions

Appeared in Year: 2009

MCQ▾

Question

The aggregation of all eco systems on the earth is referred to as- (December)

Choices

Choice (4) Response

a.

Ecosphere

b.

Atmosphere

c.

Ionosphere

d.

Stratosphere

Question number: 23

» Ecosystems » Ecosystem Types and Diversity

Appeared in Year: 2009

MCQ▾

Question

How many sites as potential areas for biosphere reserves have been identified by the National MAB Committee for the Department of Environment? – (December)

Choices

Choice (4) Response

a.

13

b.

33

c.

23

d.

43

Question number: 24

» Ecosystems » Food Chains

Appeared in Year: 2011

MCQ▾

Question

When one species limits access of another species to a resource regardless of whether the resource is abundant or scarce, it is called – (December)

Choices

Choice (4) Response

a.

Intraspecific competition

b.

Exploitative competition

c.

Interspecific competition

d.

Interference competition

Question number: 25

» Ecosystems » Population

Appeared in Year: 2011

MCQ▾

Question

The population (N) of an ecosystem follows logistic growth. If K is its carrying capacity, then the environmental resistance is – (December)

Choices

Choice (4) Response

a.

N2K

b.

1NK

c.

NK

d.

NK

Question number: 26

» Ecosystems » Abiotic and Biotic Components

MCQ▾

Question

Successive increase in concentration of some chemicals through different food level organisms is called – (December)

Choices

Choice (4) Response

a.

Biological magnification

b.

Chemical production

c.

Biodegradation

d.

Biogeochemical cycle

Question number: 27

» Ecosystems » Food Chains

Appeared in Year: 2011

MCQ▾

Question

Which of the following is a correct sequence found in a grassland ecosystem? – (December)

Choices

Choice (4) Response

a.

Grasses → Diatoms → deer → dog

b.

Grasses → rabbit → wolves → tiger

c.

Grasses → snakes → deer → dog

d.

Trees → birds → hawks → wolves

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