676: In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the
1. decomposer microorganisms to the surface.
2. nutrients to the surface.
3. bottom-dwelling organisms to the surface.
Which of the statements given above is/are correct ?
(a) 1 and 2
(b) 2 only
(c) 2 and 3
(d) 3 only
Explanation:
Marine upwelling brings nutrients to the surface. And this is the reason behind the area associated with marine upwelling result in high fishery production. So only option 2 is correct.
677: In which one of the following places is the Shompen tribe found?
(a) Spiti Valley
(b) Nicobar Islands
(c) Nilgiri Hills
(d) Lakshadweep islands
Explanation:
The Shompen tribe is one of the two Mongoloid tribes that inhabit the union territory of Adaman and nicobar Islands. The shompens consist of two subdivisions: the hostile Shompens and the Mawa Shompens. There have been instances in the Past in which the hostile Shompens have declared wars are now a story of the past.
678: Consider the following fauna of India :
1. Gharial
2. Leatherback turtle
3. Swamp deer
Which of the above is / are endangered?
(a) 1 and 2 only
(b) 1, 2 and 3
(c) 3 only
(d) None
Explanation:
Among these option Gharial and Leatherback turtle are the endangered species of India.
Swamp deer (Barahsingha) is not endangered species.
So option 1 and 2 is correct.
679: If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because
(a) Propagules of the trees in a rain forest have poor viability
(b) The soil of rain forest is deficient in nutrients
(c) The rain forest species are slow growing
(d) Exotic species invade the fertile soil of rain forest
Explanation:
It is difficult to regenerate the tropical rain forest because the soils of tropical rain forests is deficient in nutrients.
Reason:
Most of the nutrients are stored in the plants themselves. The trees in tropical rain forests are often evergreens and so very few leaves actually fall to the ground.
680: Where is Davos the venue of the annual meeting of World Economic Forum located?
(a) France
(b) Germany
(c) Switzerland
(d) Luxembourg