Topic 3 Test
Section 1: Answer all questions – spend about 20 minutes on this section.
1. The table below gives an estimate of the number of species within each group and the
number of extinctions from that group since the year 1600.
Group
Number of
extinctions
Extinction rate /
% loss
Mammals
4
90
2.250
Birds
9
113
1.250
Reptiles
6
23
0.380
Amphibians
4
2
?
19
25
0.130
1000
98
0.009
250
384
?
Fishes
Invertebrates
Flowering plants
(a)
Approximate
number of
species / × 103
Calculate the extinction rate (as a percentage loss) for amphibians and flowering plants.
amphibians: .................................................................................................................
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flowering plants: ..........................................................................................................
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[2]
(b)
In the next 100 years it is estimated that at least 100 species of large terrestrial predators
will become extinct. Suggest why this particular set of animals is prone to extinction.
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[2]
(c)
State one governmental and one non-governmental organization involved in the
conservation of species.
Governmental: ............................................................................................................
Non-governmental: .....................................................................................................
© Dr. Zoe Badcock, InThinking
www.thinkib.net/ess
[1]
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(d)
Evaluate the success of a named protected area.
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[3]
(Total 8 marks)
Section 2 – Spend about 40 minutes on this section
1.
(a)
Outline the causes and timing of two past extinction episodes within the fossil record.
[4]
(b)
Compare and contrast the case histories of one species that is endangered and one species
that was endangered but has now been successfully removed from the endangered list.
[7]
(c)
Examine the strengths and limitations of species-based approaches, such as zoos, in
conserving endangered species
© Dr. Zoe Badcock, InThinking
www.thinkib.net/ess
[9]
2