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New Senior Secondary Mastering Biology (Second Edition)
Book 2
Ch 12 Reproduction in flowering plants
Exercise
Multiple-choice questions (p. 12-26)
1
C
6
C
2
3
A
4
A
A
5
A
Short questions (p. 12-27)
7
a
b
Rhizome (1)
Ginger / asparagus (1)
8
Seeds of bean
Fruits of maize
Tubers of potato
(4)
9
a
b
Type of
Explanation
reproduction
Sexual
Seeds develop from ovules after fertilization
of gametes
Sexual
Fruits develop from ovaries after fertilization
of gametes
Asexual
Tubers develop from buds by mitosis only
A: pollen tube (1)
B: ovule (1)
C: female gamete / ovum (1)
Stigma is the place where pollen grain germinates. /
The pollen tube (A) grows down the style. /
The pollen tube (A) enters the ovule (B) /
by growing through the micropyle. /
The tip of the pollen tube (A) opens. /
The male gamete fuses with the female gamete (C) /
to form a zygote.
(any 3) @(1) × 3
10 HKDSE Biology Practice Paper 2012 IB Q10a
(a) Wind (1)
The anther sacs are hanging out of the flowers. (1)
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 Oxford University Press 2014
New Senior Secondary Mastering Biology (Second Edition)
Book 2
Structured question (p. 12-28)
11 HKCEE Biology 2011 I Q9a
(a)
(i) The spikes on the surface / rough surface of the pollen grain helps its attachment onto the
body of the insect (1)
(ii) Penis (1)
Both of them are responsible for the delivery of the male gametes into the female
reproductive part. (+1)
(b)
(i) Stigma* (1)
(ii) Sucrose solution, in general, increases the success rate of pollen tube germination in these
three plants. / The success rates of pollen tube germination in these three plants increases
with the increase in sucrose concentration. (1)
The success rate of pollen tube germination is different in these three plants at the same
sucrose concentration. / Germination rate of pollen grains of plant Q is the lowest at all the
sucrose concentrations used. (1)
(iii) He can repeat the experiment several times with pollen grains from plant R to take the
average success rate. (1)
Results which are consistent but significantly different from the original ones may lend
support to this idea. / Results which are consistent and similar to those in this experiment
would refute his idea. (1)
Total: 8 marks
-6-
 Oxford University Press 2014
New Senior Secondary Mastering Biology (Second Edition)
Book 2
Essay (p. 12-28)
12 HKALE Biology 2010 II Q6a
Reading to learn (p. 12-29)
1
2
3
The new plants are formed by mitotic cell division of the cells from the parent plant. 1
To ensure that there are no fungi or bacteria 1
to cause infection in the plant tissues or plantlets. 1
Plantlets are grown under sterile and disease-free conditions. This reduces the loss of plants due to
disease. 2
The conditions for growth are well controlled. This increases the success rate of propagation of
plants. 2
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 Oxford University Press 2014