(4 marks)
Total 13 marks
9.
1992 #3 [14 marks]
Figures 3 A and 3 B represent cells undergoing nuclear division.
(a)
Name the type of division occurring in EACH of the figures.
(1 mark)
(b)
State TWO differences between Figures 3 A and 3 B.
(3 marks)
Authored & Compiled by Tamicka Bonnick
Page | 129
(c)
Name TWO areas of a plant in which you would expect the type of division seen in
Figure 3 B to occur.
(1 mark)
(d)
To what TWO processes does the type of division in Figure 3 B contribute?
(2 marks)
(e)
Name TWO organs EACH in man and in flowering plants in which the type of
division shown in Figure 3 A occurs.
(2 marks)
(f)
(i)
Explain what happens during the type of division occurring in Figure 3 A.
(ii)
State the importance of this type of division in reproduction.
(4 marks)
Authored & Compiled by Tamicka Bonnick
Page | 130
13.
May/June 2008 #3 [15 marks]
(a) Figure 6 is a diagram of a dividing cell of an organism which has a diploid chromosome
number of 4.
(i)
On the diagram in Figure 6, write the name of the structures labelled I and II.
(2 marks)
(ii)
What type of cell division is illustrated in Figure 6?
(1 mark)
(iii)
Give TWO reasons for your response in (a)(ii) above.
(2 marks)
(iv)
How many chromosomes would there be in the daughter cells produced in the cell
division illustrated in Figure 6?
_________________________________________________________________________________
(1 mark)
(v)
Give TWO advantages to an organism of this type of cell division.
_________________________________________________________________________________
_________________________________________________________________________________
(2 marks)
Authored & Compiled by Tamicka Bonnick
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15.
June 2000 #3 [14 marks]
(3 marks)
(a)
(i)
Complete Figures 7a and 7b above using the symbols n or 2n inside each
circle to show two different forms of cell division. Give EACH diagram a title.
(ii)
Explain the significance of the differences between the two types of cell
division.
(2 marks)
In the heart of a seed buried deep so deep
A dear little plant lies fast asleep
Wake said the sunshine and creep to the light
Wake said the voice of the raindrops bright
The little plant heard and rose to see
What a wonderful outside world could be
(2 marks)
Authored & Compiled by Tamicka Bonnick
Page | 140
(e)
John and Jake grew plants with the same genotype
flowers.
(2 marks)
Total 15 marks
18.
Specimen Paper 2007 #3 [15 marks]
(a)
(2 marks)
(i)
Draw on the diagram the chromosomes at the end of EACH division.
(ii)
On the diagram, label a pair of homologous chromosomes in the anther cell.
(1 mark)
(2 marks)
(b)
(i)
Why is it important for chromosomes to pair before Division 1?
(2 marks)
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Page | 147
(ii)
What would the daughter cells shown in Figure 2 above become?
(1 mark)
(c)
(i)
What type of cell division is illustrated in Figure 2?
(1 mark)
(ii)
Suggest why this type of cell division is important to the plant.
(1 mark)
(d)
(i)
Sometimes in nature there is an unexpected change in the genes or in a
chromosome. What is this change called?
(1 mark)
(ii)
Genes in a chromosome can also be changed by genetic engineering. Suggest TWO
differences between genetic engineering and natural selection.
(2 marks)
Authored & Compiled by Tamicka Bonnick
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