Ecosystems (CBSE-NET (UGC) Environmental Science (Paper-II & Paper-III)): Questions 17 - 21 of 28

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Question number: 17

» Ecosystems » Population

Appeared in Year: 2015

MCQ▾

Question

If K is carrying capacity of a population N in an ecosystem following the logistic growth, its growth rate becomes zero when (June)

Choices

Choice (4) Response
a.

N = Half of the carrying capacity of the habitat

b.

Mortality > Natality

c.

NK=1

d.

NK=0

Question number: 18

» Ecosystems » Energy Flows

Appeared in Year: 2015

MCQ▾

Question

The amount energy at one tropic level divided by the amount of energy at the trophic level immediately below it is termed as: - (June)

Choices

Choice (4) Response
a.

Consumption efficiency

b.

Production efficiency

c.

Trophic efficiency

d.

Assimilation efficiency

Question number: 19

» Ecosystems » Population

Appeared in Year: 2015

MCQ▾

Question

A good sample design should result in: - (June)

Choices

Choice (4) Response
a.

Unsystemic bias

b.

Highly varied sampling error

c.

A truely representative sample

d.

Low level of confidence

Question number: 20

» Ecosystems » Population

Appeared in Year: 2011

MCQ▾

Question

For the following Poisson distribution

P(X)=2xe2x!;X=0,1,2,

the value of the mean is – (December)

Choices

Choice (4) Response
a.

4

b.

12

c.

1

d.

2

Question number: 21

» Ecosystems » Population

Appeared in Year: 2011

MCQ▾

Question

The amount of biomass which can be sustained under steady state condition of an ecosystem is termed as – (December)

Choices

Choice (4) Response
a.

Sustainable yield

b.

System homeostasis

c.

Carrying capacity

d.

Primary productivity

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