Page 41 - Ranger SPM 2022 Biology

Biology SPM SPM Model Paper
38. In Drosophila melanogaster (fruit fly), B deer and mousedeer have
allele R for red eye is dominant and different body sizes
allele r for white eye is recessive. C deer and mousedeer live in
50 female flies with white eyes were different habitats
crossed with 50 male flies with red D deer and mousedeer have
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eyes. A total of 340 of their offspring different genotypes
were found to have white eyes. How
many of the offspring had red eyes? 40. Which statement shows the advantage
A 113 of planting soy bean plants that are
B 340 resistant to herbicides?
C 840 A Less herbicides will be needed to
D 1020 spray on the crop
B Less competition between soy
39. The difference in shape of horns of bean plants and weeds in the
deer and mousedeer is not considered environment
a variation because C Less risk of the crop being harmed
A deer and mousedeer are two by diseases
different species D Less damage of the crop by pests

PAPER 2
2 hours 30 minutes
Section A
[60 marks]
Answer all questions in this section.

1. Figure 1 shows two types of protozoa, (b) Explain the role of M in controlling
X and Y. water equilibrium in X and Y.
[2 marks]
M
(c) In an experimental activity, a pupil
placed protozoa X in water that
contained respiratory inhibitor.
Predict what happens to protozoa
X Y X. Explain your answer.
Figure 1 [3 marks]
(a) State the level of organisation of
protozoa X and Y.
[1 mark]

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