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1. A group of students carried out some fieldwork to investigate the diversity of insects in
three habitats:

· a field of barley

· a field of wheat

· the vegetation under a hedge.

Their results are shown in the table below. The table also shows how they used their…

Page 2

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Show your working and write your answer in the shaded box in the table.
[2]




(ii) Using the data in the table, suggest why the value of Simpson's Index
of Diversity (D) for the vegetation under the hedge is so much higher
than that for the wheat field.

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Page 3

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numbers in wheat field / AW;
more niches for insects in vegetation under hedge/ more species of
plants grow under hedge than in wheat field/ AW;
ref. use of, chemicals/ insecticides/herbicides, on wheat and not
on hedge vegetation;
AVP; e.g. ref. plants under hedge more likely to be wild/native
compared…

Page 4

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(ii) Suggest why some conservationists might object to these studies.

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[2]
[Total 5 marks]




4. (i) ref to (bio)diversity values and need for conservation;
ref to endangered species and need for protection;
ref to laws concerning endangered species (that might affect decision);
ref to planning stipulation…

Page 5

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(ii) Suggest two reasons why the black rhinoceros is endangered.

1 .............................................................................................................

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2 .............................................................................................................

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[2]




(b) State two ways in which the CITES agreement is helping to save endangered
species, such as the black rhinoceros.

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2 ......................................................................................................................

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[2]
[Total 6 marks]




6. (a) (i)…

Page 6

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7. Outline the potential benefits to agriculture of maintaining the biodiversity of wild
animals and plants.

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[Total 4 marks]




8. source of food;
source of plant varieties for cross breeding / selection;
to breed in disease resistance / pest resistance;
to breed…

Page 7

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10. 1 ref to setting grid/area to be sampled;
2 suitable systematic method chosen/ref to belt/line transect;
3 ref to repetition of line transects;
4 use of quadrats;
5 use of appropriate sized quadrat;
6 details of regular quadrat placing;
7 identify species/use of keys;
8 presence or absence in…

Page 8

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12. viability
ensure that seeds are germinated from time to time;
collect new seeds produced;
ref to suitable storage conditions; 2 max
variability
ensure that you have many seeds;
collect seeds from different areas;
ref to mixture of genotypes; 2 max max 3
[3]




13. In this question, one mark…

Page 9

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14. Management problems
1 capture of species/AW;
2 numbers of species caught ref to extinction;
3 ref to named example e.g. elephants;
4 maintenance of genetic variability/gene pool;
5 ref to funding;
6 ref to species ownership/AW;
7 problems of storage and maintenance;
8 ref to specific example of problem;…

Page 10

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16. a species threatened with extinction / AW ;
man-made or natural changes in their environment /AW ;
A hunting and poaching
numbers, reduced to a critical level / so low that reproduction affected /
AW ; A only small numbers left max 2
[2]




17. Hedgerows are important in…

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