Objective Questions
|
1
|
A
|
9
|
D
|
|
2
|
C
|
10
|
D
|
|
3
|
D
|
11
|
C
|
|
4
|
B
|
12
|
C
|
|
5
|
A
|
13
|
D
|
|
6
|
A
|
14
|
A
|
|
7
|
C
|
15
|
B
|
|
8
|
D
|
|
|
Section A / Bahagian A
1. (a) (i) Genetic factor
(ii) Various alignments of
homologous chromosomes during metaphase together
with crossing over during prophase I
produce different combinations of alleles in gametes.
(b)(i) Draw a bar chart
(ii) Discontinuous variation
(iii) No intermediate values among
individuals, discrete distribution
(c) Thumbprints, blood groups
(d) The graph of the heights of
students shows normal distribution whereas the graph of the presence of dimples
shows discrete distribution. There are no intermediate values in the graph of
the characteristic of dimples whereas there are no clear cut values for the
range of values of students’ heights.
2. a (i)
|
Lengths (mm)
|
Number of earthworms
|
|
50-53
|
2
|
|
54-57
|
5
|
|
58-61
|
8
|
|
62-65
|
10
|
|
66-69
|
9
|
|
70-73
|
7
|
|
74-77
|
4
|
|
78-81
|
1
|
(ii) Draw a histogram
(b) (i) Continuous variation
(ii) There are intermediate values
(iii) Mass of earthworms, size of
earthworm
(c) (i) Earthworm in container P has the fastest growth rate.
(ii) Environmental factors such as
types of soil and the presence of light affect the growth of earthworms.
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