Form 3 Chapter 4

Form 3 Science Chapter 4

FORM 3 CHAPTER 4 REPRODUCTION 1. Diagram 1 shows the parts of a flower.

P: ……………………………

Q: ……………………………

R: ……………………………

Diagram 1 (a) Label P, Q and R on Diagram 1 with the following words. Ovary

Stigma

Petal [3 marks]

(b) What is the function of P? ……………………………………………………………………………………………………… [1 mark] (c) What happens to R after pollination and fertilisation? ……………………………………………………………………………………………………… [1 mark] (d) The male reproductive organ of the flower is known as the stamen. What is the stamen made up of? ……………………………………………………………………………………………………… [1 mark]

158

Form 3 Science Chapter 4

2. Diagram 2 shows the male reproductive system in humans.

L: …………………………… M: ……………………………

N: ……………………………

Diagram 2 (a) Label L, M and N on Diagram 2 with the following words. Sperm duct

Seminal vesicle

Testis [3 marks]

(b) Match the part of the male reproductive system to its function. Draw lines to match. FUNCTION

PART

Channels sperms and urine out of the body

L

Produces sperms M Carry sperms form the testis to the urethra N

Secrete a fluid that nourishes the sperms [3 marks]

159

Form 3 Science Chapter 4

3. Diagram 3 shows the female reproductive system in humans.

P: ………………………………

Q: ………………………………

R: ……………………………… Diagram 3 (a) Using the following words, label P, Q and R on Diagram 3. Ovary

Fallopian tube

Uterus [3 marks]

(b) What is the function of Q? ……………………………………………………………………………………………………… [1 mark] (c) (i) Name the process that takes place at P. …………………………………………………………………………………………………… [1 mark] (ii) Explain what happens during the process in (c) (i). ………………………………………………………………………………………………… [1 mark] (d) Label the cervix on Diagram 3 with the alphabet, S. [1 mark]

160

Form 3 Science Chapter 4

4. Diagram 4 shows the structure of flowers P, Q, R and S.

P

Q

R

S

Diagram 4 (a) Based on the observations in Diagram 4, state one characteristic of each flower. P: ……………………………………………………………………………………………….. Q: ………………………………………………………………………………………………. R: ………………………………………………………………………………………………. T: ………………………………………………………………………………………………. [4 marks]

161

Form 3 Science Chapter 4

(b) Classify P, Q, R and S into two groups based on common characteristics. P, Q, R and S

Common characteristic

Alphabets representing the flowers [4 marks] (c) Based on the observations in Diagram 4, make an inference on how the flowers are pollinated. R: ………………………………………………………………………………………………….. S: ………………………………………………………………………………………………….. [2 marks]

162

Form 3 Science Chapter 4

5.

Diagram 5 shows the process of sexual reproduction in human beings.

Cell N

Cell M

+

Process S

P: …………………………..

Q: …………………………..

R: …………………………..

Baby Diagram 5

163

Form 3 Science Chapter 4

(a) (i) What is process S? ..………………………………………………………………………………………………… [1 mark] (ii) Where does process S takes place in the human body? …………………………………………………………………………………………………… [1 mark] (b) Label P, Q and R on Diagram 5. [3 marks]

(c) State one difference between cell M and N. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… [1 mark]

164