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Biodiversity and Conservation

Long Answer Type

51. What kinds of threats to the biodiversity may lead to its loss ?

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Short Answer Type

52. Name the two basic methods of conservation of biodiversity..

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Long Answer Type

53. Explain the following :

(Ð°) IUCN Red List

(b) Protected areas.

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One Word Answers

54. What is the total number of hotspots in the world?

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Short Answer Type

55.

Using a chart show the in situ and ex situ approaches of conserving biodiversity in India.

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56. How can we preserve threatened species of plants..

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57. Write critical notes on the following :

(i) Hot spots of biodiversity

(ii) Ex situ conservation

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58.

Give three hypotheses for explaining why tropics show greatest levels of species richness.

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59. Amazonian rain forest has the greatest biodiversity on earth. List any two hypotheses that are proposed by the biologists to account for the greater biological diversity.

Tropical Amazonian rain forests in South America has greatest biodivesity. It may be due to following reasons :

1. Tropical latitudes have remained undisturbed for millions of years thus had a long evolutionary time for species diversification.

2. Tropical environment are less seasonal, relatively more constant and predictable which promotes niche specialisation and lead to greater species diversity.

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60. Among the ecosystem services are control of floods and soil erosion. How is this achieved by the biotic components of the ecosystem ?

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