CLASSIFICATION QUESTIONS
1.
The diagram shows how organisms may be separated into five kingdoms.
All organisms
Includes
single-celled
organisms
DNA in linear
strands associated
with protein
All lack
chlorophyll
Kingdom D
(a)
(i)
DNA in circular
strands not
associated with
protein
Kingdom A
Does not include
single-celled
organisms
Possess
chlorophyll
Kingdom B
Do not possess
chlorophyll
Kingdom C
Some may have
chlorophyll
Kingdom E
Name kingdom B.
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(1)
(ii)
Give one characteristic, other than the possession of chloroplasts, which could be used to
distinguish cells of organisms in kingdom B from those of organisms in kingdom C.
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(1)
(b)
Which of kingdoms A, B, C, D or E represents the Fungi?
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(1)
(c)
Microactinium is a single-celled eukaryotic organism. It is an autotroph. Which of kingdoms A, B, C,
D or E includes Microactinium?
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(1)
(Total 4 marks)
2.
The diagram shows how four species of pig are classified
Animalia
Mammalia
Artiodactyla
Suidae
Potamochoerus
(a)
Sus
Potamochoerus
larvatus
Potamochoerus
porcus
Sus
scrofa
Sus
barbatus
Bush pig
Red river hog
Wild boar
Bearded pig
(i)
To which family does the red river hog belong?
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(1)
(ii)
To which genus does the bearded pig belong?
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(1)
(b)
Some biologists think bush pigs and red river hogs belong to the same species. The list below
summarises some features of the biology of bush pigs and red river hogs.

The bush pig has a body length of 100-175cm and a mass of 45-150 kg.
The red river hog has a body length of 100-145cm and a mass of 45-115kg.

The red river hog is found in West Africa. The bush pig is found in East Africa.

Both animals are omnivorous but feed mainly on a variety of underground roots and tubers.

The ranges of these animals overlap in Uganda. In this area populations of animals which have
all characteristics intermediate between those of bush pigs and red river hogs have existed for
many years.
Do you think that bush pigs and red river hogs belong to the same or to different species? Explain how
the information above supports your answer.
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(3)
(Total 5 marks)
3.
In an experiment, males and females of different species of fruit fly, Drosophila, were kept together. Male
fruit flies show complex courtship behaviour before they attempt to mate. The table shows the percentage of
females that mated when kept with males of different species.
Females
Males
Percentage of females that mated
D. serrata
D. serrata
90.2
D. serrata
D. birchii
0.7
D. serrata
D. dominicana
1.3
D. birchii
D. birchii
76.9
D. birchii
D. serrata
1.0
D. birchii
D. dominicana
0.4
D. dominicana
D. dominicana
93.0
D. dominicana
D. serrata
0.0
D. dominicana
D. birchii
3.7
(a)
In the classification of fruit flies, which biological subdivision is represented by the name Drosophila?
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(1)
(b)
(i)
What do the data show about the mating preference of female Drosophila?
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(1)
(ii)
Suggest an explanation for this mating preference.
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(2)
(iii)
Suggest how these three species of Drosophila might have evolved from a common ancestor.
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(3)
(Total 7 marks)