module questions

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CHAPTER 12: REPRODUCTION AND GROWTH 1 REPRODUCTION AND GROWTH Question 1 Figure 1 Figure 1 shows the regulation of specific hormones towards the development in the ovary. a. i. Based on Figure 1, state hormone X (1m) ___________________________________________________________ ii. State the role of hormone X.(1m) __________________________________________________________ b. In Figure 1, draw the change that occurs to structure T on the 26 th day. (1m) __________________________________________________________ c. Identify hormone P and Q (2m)

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Page 1: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 1

REPRODUCTION AND GROWTH

Question 1

Figure 1

Figure 1 shows the regulation of specific hormones towards the development in the

ovary.

a. i. Based on Figure 1, state hormone X (1m)

___________________________________________________________

ii. State the role of hormone X.(1m)

__________________________________________________________

b. In Figure 1, draw the change that occurs to structure T on the 26th day. (1m)

__________________________________________________________

c. Identify hormone P and Q (2m)

_________________________________________________________

Page 2: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 2

Question 2

Figure 2

Figure 2 shows the reproductive structures of different organism.

a. Based on Figure 2, label X and Y in space provided.(2m)

b. State the organism that produced A and B.(2m)

_________________________________________________________

c. Describe what happens to nuclei P and Q before fertilization takes place. (2m)

____________________________________________________________

____________________________________________________________

d. Explain the roles played by X and Y in ensuring that fertilisation takes place (2m)

______________________________________________________________

______________________________________________________________

Page 3: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 3

Question 3

Figure 3

Figure 3 shows the process of sperm formation in the mammalian testis.

a .i. State P and Q (2m)

P: ___________________________

Q:___________________________

ii. Give reasons why cells Q and R are genetically identical. (2m)

____________________________________________________________

iii. Name two ways how cell division leads to cell S and T being genetically

different. (2m)

____________________________________________________________

Page 4: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 4

Question 4

Figure 4

Figure 4 shows the process of ovum formation in the mammalian ovary.

a. i. State the structures labelled L, M and N (3m)

L : _______________________

M: _______________________

N: _______________________

ii. State the hormone involved in the formation of follicle and explain the role of it

(2m)

__________________________________________________________________

b. The menstrual cycle involves four type of hormones. Name the hormones. (2m)

___________________________________________________________________

c. Describe how structure N produces progesterone. (2m)

___________________________________________________________________

___________________________________________________________________

___________________________________________________________________

Page 5: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 5

Question 5

Figure 5

Figure 5 shows certain events that take place in the ovary and Fallopian tube.

a. i. Name the process labelled P (1m)

______________________________________________________________

ii. State the type of cell division takes place at Q. !m)

______________________________________________________________

b.i. Name the structure labelled R.(1m)

______________________________________________________________

ii. Describe its function during pregnancy. (2m)

______________________________________________________________

______________________________________________________________

c..i. On Figure 5, label the region where fertilization takes place with ‘F’ letter. (1m)

ii. Predict what will happen if two ova released during ovulation and are fertilised.

(2m)

_________________________________________________________________

Page 6: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 6

_________________________________________________________________

Question 6.Figure 1 below shows the process of fertilization in an embryo sac. P are carried in the pollen tube to the embryo sac. P are carried in the pollen tube to the embryo sac.

(a) (i) What are P? ______________________________________________________________________

(1m) (ii) How are P formed? ______________________________________________________________________

(1m)(b) State whether the chromosomal number of P is haploid or diploid ______________________________________________________________________

(1m)(c) What are X, Y and Z? X:____________________________________________________________________ Y:____________________________________________________________________ Z:_____________________________________________________________________ (3m)(d) How do P enter the embryo sac? ______________________________________________________________________

(1m)(e) (i) Explain what happens after P enter the embryo sac.

______________________________________________________________________ ______________________________________________________________________

Page 7: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 7

______________________________________________________________________ (3m) (ii) Name this process. ______________________________________________________________________ ______________________________________________________________________

(1m)

Question 7.Figure below shows a pollen that was removed from the stigma after being there for a while

(a) (i) What process is experienced by the pollen? ______________________________________________________________________

(1m)

(ii) Name structure X.

______________________________________________________________________ (1m)

(iii) Draw all nuclei on the pollen in figure 2 and label them.

(2m)

Page 8: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 8

(b) (i) Draw the development and growth of structure X up to the embryo sac, in the figure below.

(ii) Name the process that occurs when structure X reaches the plant’s embryo sac.

______________________________________________________________________ (1m)(c) (i) Explain how the process in (b) (ii) occurs. ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ (2m)

(ii) What are the products obtained from this process?

1.__________________________________________________________________ 2. _________________________________________________________________ (2m)

(d) At the end of the process in (b)(ii), what happens to the

(i) Ovary?

______________________________________________________________________

Page 9: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 9

(1m) (ii) Integument?

______________________________________________________________________ (1m) (iii) Ovule?

______________________________________________________________________ (1m)

Page 10: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 10

LEARNING AREA : REPRODUCTION AND GROWTH

Activity 1. Complete the table below.

Comparison between the formation of sperm and ova.

A.

B.

DIFFERENCES SPERMATOGENESIS OOGENESIS

1. Gametes produced i. ii.

2. Place of formation iii. iv.

3. Size of gametes v. vi.

4. Number of gametes

produced

vii. viii.

5. Cytokinesis Equal distribution of

cytoplasm in all four sperm

cells produced

Unequal

6. Shape of gametes ix. x.

7. Germinal epithelial cells Divide by mitosis

throughout adult

Divide by mitosis during

foetal stage

8. Meiotic division xi.

Spermatogenesis Oogenesis

Similarities

1. Location : _______________________

2. Process involve: __________________

3. Products : _________________________

Page 11: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 11

Activitiy 2. Complete the table below

Comparison between identical twins and fracternal twins

DIFFERENCES IDENTICAL TWINS FRACTERNAL TWINS

a. Fertilisation 1. 2.

b. Genetic constitution 3. 4

c. Number of placentae 5. 6.

d. Sex 7. 8.

e. Physical characteristics 9. 10.

Activity 3 : Complete the text below

i. Both identical twins and fracternal twins grow by the process of

_______________.

ii. The embryos formed are there result of ______________________ between

an ovum and a sperm.

Page 12: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 12

ESSAY QUESTIONS

1.

Diagram 1

Diagram 1 shows the stages of secondary growth in the stem of dicotyledonous plants.

(a) Explain the stages of growth that happen in the shoot of dicotyledonous plants which produced the primary tissues as shown at section A in Diagram 1.

[10 marks]

(b) Describe how the secondary growth occurs starting from section A to section D in Diagram 1.

[10 marks]

Primary xylem

Primary phloem

Vascular cambium

Secondary phloem

Secondary xylem

Intervascular cambium

A B

C D

Page 13: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 13

2. Diagram 2 shows a type of growth curve .

Diagram 2

Based on Diagram 2, explain the growth curve .

[10 marks]

3. (a) (i) Diagram 3 (a) shows the formation of two pairs of twins.

Explain the similarities and differences in the formation of the two pairs of twins.

[4 marks]

B

CC

A

DE

F

Dry mass of plant (g)

Time (day)

Diagram 3 (a)

Page 14: Module Questions

CHAPTER 12: REPRODUCTION AND GROWTH 14

(ii) Diagram 3 (b) shows another two pairs of twins.

Diagram 3(b)

Explain the differences between the two pairs of twins. Your explaination should be based on the following aspects.

Types of twins The formation of twins Characteristics of twins

[6 marks]

4.

Explain one modern technique that can be used by the childless couple to conceive.

[ 10 marks ]

The fallopian tubes of a married woman are blocked, making it

impossible for her to conceive through the natural process. She and her husband insist to have their own child .