Describe in detail the species-area relationship of biodiversity

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Explain briefly the 'rivet popper hypothesis' of Paul Ehrlich.

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Explain effects of habitat fragmentation on biodiversity.

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List the three types of extinction processes.

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List the uses of biodiversity.

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Describe the main functions of biosphere reserves.

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Arun read in the newspaper about the presence of harmful levels of DDT in human beings.He failed to understand the reason for this and discussed this issue with his biology teacher who explained to him the reasons.
Read the above passage and the answer the following questions:
(i) What is the reason for high concentration od DDT in human beings?
(ii) What is biomagnification?
(iii) What value is displayed by Arun's biology teacher?

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It is our moral duty to ensure the well-being of all the living creatures for the utilization of future generation. Why is it so and how biodiversity is affected?

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Kalpna during her educational tour to a removed forest, alongwith her friends got much surprized and shocked to see that a highway was being constructed which passes through the middle of the forest. She was not at all pleased to see all this and therefore on returning home from the tour she contacted the concerned department to stop the construction of such a highway. 
Answer the following questions on the basis of above information.
(i) How would the construction of such a highway affect the biodiversity?
(ii) How are the forests useful to mankind?
(iii) What values of Kalpana are exhibited here?

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