21

What is the significance for targeting 'biodiversity hotspots' for conservation?

1. These are the areas where more species are threatened.

2. These areas are not inhabited by people, therefore conservation would not be effecting the economic development of the area.

3. To protect all areas of threatened species would not allow new species to develop.

4. It is not possible to protect species world- wide, thus it is decided to concentrate on areas which are rich in biodiversity.

Select the correct answer using the codes given below.

A

1 and 4

B

2 only

C

1 and 3 only

D

4 only

E

Answer

D

Instruction

22

Ecology is to environmental science as

A

Engineering is to physics

B

Physics is to engineer

C

Environmental science is to physics

D

Physics is to environmental science

E

Answer

B

Instruction

23

Which material from large explosive volcanic eruptions results in decrease in temperature?

1. Carbon dioxide (CO2)

2. Sulfur dioxide (SO2)

3. Water vapour (H2O)

4. Radon (Rn)

Select the correct answer using the codes given below.

A

1 only

B

2 only

C

1 and 2 only

D

3 and 4 only

E

Answer

B

Instruction

24

In a sealed container, take measured quantities of ozone, oxygen, chlorofluorocarbons and a source emitting ultraviolet radiations. What will happen after one month of exposure to ultraviolet radiation?

Ozone Oxygen CFC

A

Decrease Increase Decrease

B

Increase Increase Increase

C

Increase Decrease Decrease

D

Decrease Decrease Increase

E

Answer

A

Instruction

25

In the context of the affairs of which of the following is the phrase "Special Safeguard Mechanisms" are mentioned in the news frequently?

A

United Nations Environment Programme

B

World Trade Organisation

C

ASEAN-India Free Trade Agreement

D

G-20 Summits

E

Answer

B

Instruction

26

Why does a change of climate occur in the months following a major explosive volcanic eruption?

1. An increase in rainfall due to the loss of vegetation cover

2. An increase in average temperature due to the heat released by erupting volcanoes

3. A decrease in average temperature due to the increase in fine particle reflecting solar radiation

4. A decrease in average temperature due to increased carbon dioxide absorbing heat from the atmosphere

Which of the above given statements is/are correct?

A

1 and 3 only

B

2 only

C

3 only

D

1 and 4 only

E

Answer

C

Instruction

27

It may take 10 million years to change from greenhouse to icehouse conditions on earth. Which one of the following can be the probable cause/s for this change?

1. Accumulation of carbon dioxide

2. Drifting of Antarctic plate

3. Formation of dust clouds due to meteorite impacts

4. Removal of carbon dioxide

Which of the above given statements is/are correct?

A

1 only

B

2 and 4 only

C

1, 2 and 3 only

D

4 only

E

Answer

D

Instruction

28

When is Van Mahotsav's Day celebrated?

A

2 October

B

1 December

C

10th July

D

1 July

E

Answer

D

Instruction

29

Consider the following statements about "Terminator Technology".

1. Termination of crop pesticides

2. Transgenic varieties are going to terminate the existing varieties

3. High yielding hybrid seed for consumption; it cannot be used as seeds for next sowing

4. Termination of expression of a gene

Which of the above given statements is/are not correct?

A

1 only

B

1 and 3 only

C

3 only

D

All of the above

E

Answer

C

Instruction

30

Consider the following statements.

1. Biodiversity hot spots are located only in tropical region.

2. India has four biodiversity hotspots i.e. Eastern Himalayas, Western Himalayas. Western Ghats and Andaman and Nicobar Islands.

Which of the statements given above is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

E

Answer

D

Instruction