General Science Q & A part - 3

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

22. Ecology is to environmental science as

     (a) Engineering is to physics

     (b) Physics is to engineering

     (c) Environmental science is to physics

     (d) Physics is to environmental science.

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

24. In a sealed container, take measured quantities of zones, 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
(b)	Decrease	Decrease	increase

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 Organization

       (c) ASEAN –India Free Trade Agreement

       (d) G- 20 Summits

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 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

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

28.When is Van Mahotsav’s Day celebrated?

       (a) 2^nd October                     (b) 1^st December

       (c ) 10^th July                          (d) 1^st July

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; is cannot be used as seeds for next sowing

4. Termination of expression of 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

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.

(a)1 only                         (b) 2 only

(c) Both 1 and 2              (d) neither 1 nor 2