Intervensi biology Form 5 chapter 4

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

4. INTERVENTION – BIOLOGY CHAPTER 13