41

In India, which type of forest among the following occupies the largest area?

A

Montane wet temperate forest

B

Sub-tropical dry evergreen forest

C

Tropical moist deciduous forest

D

Tropical wet evergreen forest

E

Answer

C

Instruction

42

Consider the following statements:

1. The Taxus tree is naturally found in the Himalayas.

2. The Taxus tree is listed in the Red Data Book.

3. A drug called "taxol" obtained from Taxus tree, is effective against Parkinson's disease.

Which of the above given statements is/are correct?

A

1 only

B

1 and 2 only

C

2 and 3 only

D

1, 2 and 3

E

Answer

B

Instruction

43

What are the possible limitations of India in mitigating the global warming at present and in the immediate future?

1. Appropriate alternate technologies are not sufficiently available.

2. India cannot invest huge funds in research and development

3. Many developed countries have already. set up their polluting industries in India.

Which of the statements given above is/are correct?

A

1 and 2 only

B

2 only

C

1 and 3 only

D

1, 2 and 3

E

Answer

A

Instruction

44

Consider the following pairs:

1. Boreal Forest-high productivity; rapid cycling of nutrients (poor reservoir)

2. Perma frost-swamp forest

3. Chaparral-a type of dry shrub land

4. Tropical rain forest-feature arctic tundra

Select the correctly matched pair's using the codes given below.

A

1, 2 and 3 only

B

1 and 2 only

C

3 only

D

None of the above

E

Answer

C

Instruction

45

Biogeographic realms are

1. Land and water provinces

2. Six major land provinces

3. Divided into biomes

Select the correct answer using the codes given below,

A

1 and 2 only

B

1 and 3 only

C

1, 2 and 3 only

D

2 and 3 only

E

Answer

D

Instruction

46

Dominant plants of which type are highly adapted to recurring episodes of lightning- sparked

fires?

1. Dry shrub lands

2. Grasslands

3. Southern pine forests

Select the correct answer using the codes given below.

A

1 and 2 only

B

3 only

C

1 and 3 only

D

1, 2 and 3

E

Answer

D

Instruction

47

Biome distribution corresponds roughly with regional variations in

1. Climate

2. Soils

3. Topography

Select the correct answer using the codes given below

A

1 only

B

1 and 2 only

C

2 and 3 only

D

1, 2 and 3

E

Answer

D

Instruction

48

Consider the following pairs:

1. Marine snow-deep cool, often nutrient- rich ocean water moves upwards

2. Upwelling partially enclosed mix of sea water and fresh water

3. Eutrophication-nutrient enrichment of body of water; reduced transparency, Phytoplankton blooms

4. Estuary-basis of mid-oceans food webs

Select the correct pair using the codes given below.

A

3 only

B

4 only

C

1 and 2 only

D

None of the above

E

Answer

A

Instruction

49

Pollutants disrupt ecosystems because

A

Their component differs from those of natural substances.

B

Only humans have uses for them.

C

There is no mechanism to deal with them.

D

Their only effect is on ecosystem, not humans.

E

Answer

C

Instruction

50

Which of the following is/are responsible for regional air pollution?

1. Smog

2. Acid rain

3. Ozone layer thinning

Select the correct answer using the codes given below.

A

1 only

B

2 only

C

1 and 3 only

D

All of the above

E

Answer

B

Instruction