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21. Define biodiversity.

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22. Is biodiversity the same from place to place ?

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23.

Mention the number of extinctions that took place during the long period (> 3 billion years) since the origin and diversification of life on earth?

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24. The World Summit on Sustainable Development was held in which country and which year?

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25. What is the term ‘Frugivorous’ mean? ?

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26. What is the total number of species discovered and described present on earth ? What is the predicted number.

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27. Name the three important components of biodiversity.

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28. Name the two most biodiversity rich zones in India.

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The species which are extinct according to the IUCN Red List are:
(i) Dodo (Mauritius),
(ii) Thylacine (Australia),
(iii)Steller’s Sea Cow (Russia).

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30. Who used the rivet popper hypothesis?

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