REPRODUCTION IN PLANTS AND ANIMALS
PAST KCSE QUESTIONS ON THE TOPIC
1. At what stage of mitosis do chromosomes replicate to form daughter chromatid?
( 1 mark)
2. Fill in the blank spaces in the statement below
After fertilization of an ovule _________ develops into a testa and _________ develops
into a testa and _____________ develops into endosperm. ( 2 marks)
3. State the difference between the composition of maternal blood entering the placenta and
material blood leaving the placenta ( 3 marks)
4. After four months of pregnancy the ovaries of a woman can be removed without
terminating pregnancy. However during the first four months of pregnancy the ovaries
must remain intact if pregnancy is to be maintained. Explain these observations
( 3 marks)
5. Name two mechanisms that prevent self pollination in flowers that have both male and
female parts ( 2 marks)
6. State three characteristics that ensure cross pollination takes place in flowering plants
( 3 marks)
7. Give a reason why it is necessary for frogs to lay many eggs ( 1 mark)
8. A flower was found to have the following characteristics
- Inconspicuous petals
- Long feathery stigma
- Small light pollen grains
(a) What is the likely agent of pollination of the flower? ( 1 mark)
, (b) What is the significance of the long feathery stigma in the flower ( 1 mark)
9. State two ways by which the human Immuno Deficiency virus (HIV) is transmitted other
than sexual intercourse? ( 2 marks)
10. Explain why sexual reproduction is important in organisms ( 3 marks)
11. State two disadvantages of self- pollination ( 2 marks)
12. The chart below shows the number of chromosomes before and after cell division and
fertilization in a mammal.
2n 2n
z z
n n n n
2n
n n
(a) What type of cell division takes place at Z? ( 1 mark)
(b) Where in the body of a female does process Z occur? ( 1 mark)
(c) On the chart indicate the position of parent and gametes ( 2 marks)
13. (a) What is meant by the terms
(i) Epigynous flower ( 1 mark)
(ii) Staminate flower (1 mark)
(b) How are the male parts of wind- pollinated flowers adapted to their function?
( 4 marks)
14. Name the part of a flower that developed into:
(a) Seed ( 1 mark)
PAST KCSE QUESTIONS ON THE TOPIC
1. At what stage of mitosis do chromosomes replicate to form daughter chromatid?
( 1 mark)
2. Fill in the blank spaces in the statement below
After fertilization of an ovule _________ develops into a testa and _________ develops
into a testa and _____________ develops into endosperm. ( 2 marks)
3. State the difference between the composition of maternal blood entering the placenta and
material blood leaving the placenta ( 3 marks)
4. After four months of pregnancy the ovaries of a woman can be removed without
terminating pregnancy. However during the first four months of pregnancy the ovaries
must remain intact if pregnancy is to be maintained. Explain these observations
( 3 marks)
5. Name two mechanisms that prevent self pollination in flowers that have both male and
female parts ( 2 marks)
6. State three characteristics that ensure cross pollination takes place in flowering plants
( 3 marks)
7. Give a reason why it is necessary for frogs to lay many eggs ( 1 mark)
8. A flower was found to have the following characteristics
- Inconspicuous petals
- Long feathery stigma
- Small light pollen grains
(a) What is the likely agent of pollination of the flower? ( 1 mark)
, (b) What is the significance of the long feathery stigma in the flower ( 1 mark)
9. State two ways by which the human Immuno Deficiency virus (HIV) is transmitted other
than sexual intercourse? ( 2 marks)
10. Explain why sexual reproduction is important in organisms ( 3 marks)
11. State two disadvantages of self- pollination ( 2 marks)
12. The chart below shows the number of chromosomes before and after cell division and
fertilization in a mammal.
2n 2n
z z
n n n n
2n
n n
(a) What type of cell division takes place at Z? ( 1 mark)
(b) Where in the body of a female does process Z occur? ( 1 mark)
(c) On the chart indicate the position of parent and gametes ( 2 marks)
13. (a) What is meant by the terms
(i) Epigynous flower ( 1 mark)
(ii) Staminate flower (1 mark)
(b) How are the male parts of wind- pollinated flowers adapted to their function?
( 4 marks)
14. Name the part of a flower that developed into:
(a) Seed ( 1 mark)
