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The Daily Telegraph News in Action 4
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News in Action 4 (1999)(Daily Telegraph)[Mac-PC].iso
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Mankind 'speeding up pace of extinction'
1 a) Tropical forests and coral reefs are centres of 'biodiversity'. Explain
what is meant by this term.
b) Why can soil be considered a centre of biodiversity?
c) Suggest two reasons why we should be concerned about the
extinction of species.
d) The rate at which species are being lost is increasing. Which human activities result in the loss of species?
e) What do you understand by the term 'commercial extinction'?
2 a) Explain how modern fishing techniques have reduced stocks of many fish species to dangerously low levels.
b) How do these fishing techniques result in the destruction of millions of marine invertebrates? Why should this concern us?
3 a) Just as it is important to preserve plant and animal species, it is also important to preserve and maintain different types of microbe. Why?
b) Make a list of the ways in which we have made use of microbes in
recent years.
c) The smallpox virus has been eradicated in the wild. Should we still keep it in laboratories?
4 a) Some 'extinct'microbes are being revived and given a new lease of life. How is this possible?
b) What are the risks and benefits of reviving these microbes?
5 a) The giant hogweed is an extremely noxious plant. Where did it come
from and how did it get here?
b) How has it been able to spread so quickly along the river banks of England and Wales?
c) Should the giant hogweed be completely exterminated? Justify your answer.