Page 46 - Ranger SPM 2022 Biology

Biology SPM SPM Model Paper
Section B
[20 marks]
Answer any one question in this section.
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9. (a) Figure 9.1 shows a menstruation cycle that is controlled by specific hormones
produced in pituitary glands and ovaries.

Ovarian cycle

FSH
Level of pituitary
hormones
LH

Level of ovarian
hormones Oestrogen
Progesterone
Changes in
endometrium
Endometrium

1 5 14 28
Days in a menstrual cycle

Figure 9.1
(i) Describe the changes and (c) Flower is a plant reproductive
functions of each hormone organ. Fertilisation occurs in
that is produced by pituitary ovule to produce fruit. Figure 9.2
glands and ovaries in a shows fertilisation process in a
menstrual cycle. flower.
[8 marks] Pollen grain

(ii) Four hormones involved in Stigma
a menstrual cycle are used Pollen tube
to either treat a woman
who wants to get pregnant
or to help a woman to
avoid pregnancy. Explain Ovary
the applications of these
hormones in both the Ovule
situations.
[4 marks]

Figure 9.2

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Model Paper.indd 392 3/29/22 5:22 PM