CAMBRIDGE IGCSE™ BIOLOGY: END-OF-CHAPTER TEST 1
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End-of-chapter 1 test
In 2015, a team of scientists discovered a new species of rodent on the island of Sulawesi, Indonesia.
They gave it the binomial name Hyorhinomys stuempkei.
1 Hyorhinomys stuempkei is the only known member of a group of mammals that belong to
the taxon Hyorhinomys. Identify the name of this taxon. Choose and circle the answer
you consider correct.
kingdom B species C genus D family [1]
The common names of Hyorhinomys stuempkei are the ‘hog-nosed rat’ and the ‘Sulawesi snouter’.
These are based on its unusual nose (Figure 1.1).
Figure 1.1
2 Suggest two advantages of using binomial names rather than common names in biology.
i _______________________________________________________________________
ii _______________________________________________________________________ [2]
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CAMBRIDGE IGCSE™ BIOLOGY: END-OF-CHAPTER TEST 1
3 In the box below, draw a large diagram of the nose of Hyorhinomys stuempkei.
[4]
4 Hyorhinomys stuempkei eats only soft-bodied animals. It has only two teeth, which
are both incisors. Explain why this observation surprised the scientists who discovered
this mammal.
____________________________________________________________________________ [1]
5 At first, it was difficult to decide whether Hyorhinomys stuempkei is more closely related
to rats, shrews or wild hogs. Describe how DNA can be used to classify organisms
more accurately.
____________________________________________________________________________
____________________________________________________________________________ [2]
Figure 1.2 shows some of the soft-bodied animals that are eaten by Hyorhinomys stuempkei.
These diagrams are shown to scale.
Species A Species B Species C Species D
Figure 1.2
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CAMBRIDGE IGCSE™ BIOLOGY: END-OF-CHAPTER TEST 1
6 In the box below, draw a dichotomous key to help distinguish between these
four organisms.
[4]
7 Species A is an earthworm. Earthworms belong to a group of soft-bodied animals
called annelids. Using Figure 1.2, state two features of annelids that are different
from arthropods.
i ________________________________________________________________________
ii ________________________________________________________________________ [2]
8 State two of the seven characteristics of life that are shared by Hyorhinomys stuempkei and
the animals shown in Figure 1.2. Describe what is meant by your two characteristics.
Term 1 __________________________________________________________________
Description __________________________________________________________________
__________________________________________________________________
Term 2 __________________________________________________________________
Description __________________________________________________________________
__________________________________________________________________ [4]
[Test total: 20]
END OF TEST
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