CBSE-NET (Based on NTA-UGC) Environmental Science (Paper-II): Questions 140 - 144 of 385

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Question number: 140

» Ecosystems » Population

Appeared in Year: 2015

MCQ▾

Question

As the population growth rate increases the doubling time: (June)

Choices

Choice (4) Response

a.

Remain constant

b.

Double

c.

Decrease

d.

Increase

Question number: 141

» Water » Types of Water Pollution

Appeared in Year: 2015

MCQ▾

Question

Filamentous Cyanobacteria differentiate 5 to 10 % of their vegetative cells into heterocysts. Heterocysts are characterized by:

(I) Thick cell wall

(II) Only PSI activity

(III) Nitrogenase activity

Choose the correct answer: (June)

Choices

Choice (4) Response

a.

(I) and (III) only

b.

(II) and (III) only

c.

(I) only

d.

(I), (II) and (III)

Question number: 142

» Basics of Environmental Geosciences » Earth's Processes and Geological Hazards » Earthquakes and Volcanism

Appeared in Year: 2015

MCQ▾

Question

An earthquake’s epicenter is (June)

Choices

Choice (4) Response

a.

Determined by analyzing S-wave arrival time at seismic stations

b.

Determined by analyzing P-wave arrival time at seismic stations

c.

A point on the surface directly above the focus

d.

Usually in the lower part of the mantle

Question number: 143

» Ecosystems » Parasitism, Prey - Predator Relationships

Appeared in Year: 2015

MCQ▾

Question

Parasites in a population/community can:

(I) Influence host population cycles

(II) Change ecological communities

(III) Change community structure

Choose the correct answer: (June)

Choices

Choice (4) Response

a.

(I), (II) and (III)

b.

(II) and (III) only

c.

(III) only

d.

(I) only

Question number: 144

» Endangered and Threatened Species » Biodiversity and Conservation » Strategies for Biodiversity Conservation

Appeared in Year: 2015

MCQ▾

Question

Consider the following International agreements.

(I) The International Treaty on Plant Genetic Resources for Food and Agriculture

(II) The United Nations Convention to Combat Desertification

(III) The World Heritage Convention

Which of the above has/have a bearing on the biodiversity?

Choose the correct answer: (June)

Choices

Choice (4) Response

a.

(I) and (II) only

b.

(I), (II) and (III)

c.

(I) and (III) only

d.

(III) only

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