Q1: Multiple choice questions.
(i) Conservation of biodiversity is important for :
(a) Animals
(b) Animals and plants
(c) Plants
(d) All organisms
Ans: (d)
(ii) Threatened species are those which :
(a) threaten others
(b) Lion and tiger
(c) are abundant in number
(d) are suffering from the danger of extinction
Ans: (d)
(iii) National parks and sanctuaries are established for the purpose of :
(a) Recreation
(b) Hunting
(c) Pets
(d) Conservation
Ans: (d)
(iv) Biodiversity is richer in :
(a) Tropical Regions
(b) Polar Regions
(c) Temperate Regions
(d) Oceans
Ans: (a)
(v) In which one of the following countries, the ‘Earth Summit’ was held?
(a) the UK
(b) Mexico
(c) Brazil
(d) China
Ans: (c)
Q2: Answer the following questions in about 30 words.
(i) What is biodiversity?
Ans: Biodiversity refers to the varieties of plants, animals and micro-organisms, the genes they contain and the ecosystems they form.
(ii) What are the different levels of biodiversity?
Ans: There are three different levels of biodiversity:
(iii) What do you understand by ‘hotspots’?
Ans: The areas rich in species diversity are called hotspots of diversity.
(iv) Discuss briefly the importance of animals to human kind.
Ans: Animals capture and store energy, produce and decompose organic materials, help to cycle water and nutrients throughout the ecosystem, fix atmospheric gases and help regulate the climate.
(v) What do you understand by ‘exotic species’?
Ans: Species which are not the natural inhabitants of the local habitat but are introduced into the system are called exotic species.
Q3: Answer the following questions in about 150 words.
(i) What are the roles played by biodiversity in the shaping of nature?
Ans: Biodiversity has contributed in many ways to the development of human culture and, in turn, human communities have played a major role in shaping the diversity of nature at the genetic, species and ecological levels. Biodiversity plays the following roles:
(ii) What are the major factors that are responsible for the loss of biodiversity? What steps are needed to prevent them?
Ans: The major factors that are responsible for the loss of biodiversity are:
The steps which are needed to prevent them are:
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1. What is biodiversity and why is it important for conservation? |
2. What are the major threats to biodiversity? |
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