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INTERVENTION – BIOLOGY CHAPTER 13 
CHAPTER 13 : REPRODUCTION AND GROWTH 
A : Formation of Sperms 
1. …………………….. is the process of sperm formation. 
2. This process takes place in the …………………….… 
3. Each testis consists of many …………………….……… 
4. Spermatogenesis occur on the walls of the ……………………………………… 
5. Each seminiferous tubule is lined with a layer of …………………….. ……… 
6. The germinal epithelium consists of ……………………………………………. 
7. Primordial germ cells undergo a series of cell division through ……………….to 
produce diploid ……………………………………. (2n) 
8. Each spermatogonium grows and develops into ………..……………………(2n) 
9. Each primary spermatocyte then divides through meiosis to produce two 
………………………………..(n) at the end of meiosis I . 
10. Each secondary spermatocyte undergoes meiosis II to form two ……………..(n) 
11. Each spermatid then differentiate to become a …………………………..… 
B : Formation of ovum 
1. ……………………… is the process of ovum formation. 
2. This process occurs in the …………..…………… 
3. Formation of ovum begins in the ovary of a …………… even before she is born. 
4. The ovary wall consists of a layer of ……………………………………………. 
5. This layer of germinal epithelium is made up of ………………………………… 
6. In the foetal stage, the primordial germ cells divides repeatedly by mitosis to form 
diploid ……………………..………… 
7. Each oogonium grows and develops into ………..………………………….. (2n) 
8. Each primary oocyte is surrounded by a layer of follicle cells to form a 
……………………………………..
INTERVENTION – BIOLOGY CHAPTER 13 
9. At birth, the ovary of a baby girl has millions of primary oocytes. 
10. After birth, the primary oocytes undergoes meiosis 1 but stops at prophase 1 until 
puberty. 
11. At puberty, one primary oocyte completes meiosis 1 to form two haploid cells : 
a ………………………………….. (n) and a …………………………….. (n) 
12. The secondary oocyte is larger than the polar body because of the unequal 
division of the cytoplasm. 
13. The secondary oocyte ia surrounded by follicle cells and is known as the 
……………………………………….. 
14. The secondary follicle develops and matures to form the ………………………… 
The Graafian follicle then moves to the side of the ovarian wall. 
15. During ovulation, the Graafian follicle burst and releases the ..…………………… 
from the ovary into the fallopian tube. 
16. When ………………………… occurs,the secondary oocyte undergoes and 
complete meiosis 11 to form a polar body (n) and an ………………..(n). 
17. The haploid polar body formed during meiosis 1 also undergoes meiosis 11 to 
form another two polar bodies. 
18. All ………………… polar bodies will eventually disintegrate.. 
Primary follicle 
Fluid 
Corpus luteum 
Ovum 
Secondary oocyte 
Graaf follicle 
Cross section of ovary
INTERVENTION – BIOLOGY CHAPTER 13 
19. 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? 
_________________________________________________ 
(ii) Name structure X. _________________________ 
(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. 
________________________________________________________________ 
(c) At the end of the process in (b) (ii), match the structures with the end products: 
Ovary Becomes the testa (fruit skin) 
Integument Becomes the seed 
Ovule Becomes fruit
INTERVENTION – BIOLOGY CHAPTER 13

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  • 1. INTERVENTION – BIOLOGY CHAPTER 13 CHAPTER 13 : REPRODUCTION AND GROWTH A : Formation of Sperms 1. …………………….. is the process of sperm formation. 2. This process takes place in the …………………….… 3. Each testis consists of many …………………….……… 4. Spermatogenesis occur on the walls of the ……………………………………… 5. Each seminiferous tubule is lined with a layer of …………………….. ……… 6. The germinal epithelium consists of ……………………………………………. 7. Primordial germ cells undergo a series of cell division through ……………….to produce diploid ……………………………………. (2n) 8. Each spermatogonium grows and develops into ………..……………………(2n) 9. Each primary spermatocyte then divides through meiosis to produce two ………………………………..(n) at the end of meiosis I . 10. Each secondary spermatocyte undergoes meiosis II to form two ……………..(n) 11. Each spermatid then differentiate to become a …………………………..… B : Formation of ovum 1. ……………………… is the process of ovum formation. 2. This process occurs in the …………..…………… 3. Formation of ovum begins in the ovary of a …………… even before she is born. 4. The ovary wall consists of a layer of ……………………………………………. 5. This layer of germinal epithelium is made up of ………………………………… 6. In the foetal stage, the primordial germ cells divides repeatedly by mitosis to form diploid ……………………..………… 7. Each oogonium grows and develops into ………..………………………….. (2n) 8. Each primary oocyte is surrounded by a layer of follicle cells to form a ……………………………………..
  • 2. INTERVENTION – BIOLOGY CHAPTER 13 9. At birth, the ovary of a baby girl has millions of primary oocytes. 10. After birth, the primary oocytes undergoes meiosis 1 but stops at prophase 1 until puberty. 11. At puberty, one primary oocyte completes meiosis 1 to form two haploid cells : a ………………………………….. (n) and a …………………………….. (n) 12. The secondary oocyte is larger than the polar body because of the unequal division of the cytoplasm. 13. The secondary oocyte ia surrounded by follicle cells and is known as the ……………………………………….. 14. The secondary follicle develops and matures to form the ………………………… The Graafian follicle then moves to the side of the ovarian wall. 15. During ovulation, the Graafian follicle burst and releases the ..…………………… from the ovary into the fallopian tube. 16. When ………………………… occurs,the secondary oocyte undergoes and complete meiosis 11 to form a polar body (n) and an ………………..(n). 17. The haploid polar body formed during meiosis 1 also undergoes meiosis 11 to form another two polar bodies. 18. All ………………… polar bodies will eventually disintegrate.. Primary follicle Fluid Corpus luteum Ovum Secondary oocyte Graaf follicle Cross section of ovary
  • 3. INTERVENTION – BIOLOGY CHAPTER 13 19. 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? _________________________________________________ (ii) Name structure X. _________________________ (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. ________________________________________________________________ (c) At the end of the process in (b) (ii), match the structures with the end products: Ovary Becomes the testa (fruit skin) Integument Becomes the seed Ovule Becomes fruit