Download Quiz 8

South Tuen Mun Government Secondary School
Biology Quiz 8
(A) Choose the best answer. (10 marks)
1. Binary fission
(i) occurs in bacteria,
(ii) is an example of asexual reproduction,
(iii) produces identical offspring.
A. (i) and (ii) only
B. (ii) and (iii) only
C. (i) and (iii) only
D. (i), (ii) and (iii)
2. When a new plant is developed from stem cutting. Which of the following is TRUE?
(i)
It is an example of vegetative propagation.
(ii)
The new plant has the same genetic make-up as the parent plant.
(iii)
The roots develop from the cut end of the stem.
A. (i) and (ii) only
B. (ii) and (iii) only
C. (i) and (iii) only
D. (i), (ii) and (iii)
3. Which of the following is NOT a characteristic of asexual reproduction?
A. The newly developed offspring has all the good character of the parent.
B. The newly developed offspring lives well in a changing environment.
C. The production of next generation does not involve the formation of gametes.
D. The production of next generation does not depends on external agents such as insects.
4. The process of transferring pollens from the anther one plant to the sigma of different plant is called
A. self pollination.
B. cross fertilization.
C. cross pollination.
D. cross reproduction.
5. Which of the following are the characteristics of wind pollinated flowers?
(i)
Their anthers are short and located inside the petals.
(ii)
Their stigma is feathery to catch pollens.
(iii)
A very large number of pollens are produced to ensure a better chance of fertilization.
A. (i) and (ii) only
B. (ii) and (iii) only
C. (i) and (iii) only
D. (i), (ii) and (iii)
6. A pollen grain
(i) is a male gamete.
(ii) is sticky for insect-pollinated flowers.
(iii) is produced inside the anther.
A. (i) and (ii) only
B. (ii) and (iii) only
C. (i) and (iii) only
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D. (i), (ii) and (iii)
Directions : Questions 7 – 10 refer to the diagram below which shows a section through a fruit and one of the
seeds it contains.
7. The fruit is developed from
A. the ovary of the flower.
C. the ovule of the flower.
B. the stigma of the flower.
D. the fertilized egg inside the ovule.
8. Which structure is the plumule?
A. A
B. B
C. C
9. The plumule is made from
A. meiotic cell division of the fertilized egg.
C. mitotic cell division of the seed.
B. mitotic cell division of the fertilized egg.
D. meiotic cell division of the seed.
10. Structure B is used
A. to store water for germination.
C. to grow and break open the seed coat.
B. to store food for the development of the seed.
D. to make the first green leaf after germination.
D. D
(B) Answer the following questions. (30 marks)
1. Many flowering plants increase their number by vegetative propagation.
(a) State TWO advantages of vegetative propagation.
(2 marks)
(b) State TWO ways by which vegetative propagation is different from sexual reproduction of flowering
plants.
(2 marks)
(c) (i) Give an example in which man has made use of vegetative propagation to produce food. Describe
how vegetative propagation has been carried out in this example.
(4 marks)
(ii) State TWO disadvantages of cultivating this crop food by vegetative propagation.
(2 marks)
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2. The diagram below shows the structure of part of a flower.
(a) Using “letter” in the diagram, indicate ONE structure in which
(i)
the flower is protected at the bud stage,
(1 mark)
(ii)
the pollen grains are produced,
(1 mark)
(iii) the pollen grains are received,
(1 mark)
(iv)
fertilization takes place.
(1 mark)
(b) (i) With reference to the diagram, state and explain, with TWO reasons, whether the flower is
wind-pollinated or insect-pollinated.
(3 marks)
(ii) With reference to the diagram, describe ONE way by which the chance of self-pollination is
reduced in this flower.
(1 mark)
(iii) Describe how the process of cross-pollination is carried out in this plant.
(4 marks)
(iv) What will happen to the pollen grain after cross-pollination? How does this lead to fertilization of
the female gametes?
(3 marks)
(c) Name structure C and F.
(2 marks)
(d) After fertilization, name the structure formed from (i) D, and (ii) E.
(2 marks)
(e) What will happen to F after fertilization?
(1 mark)
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South Tuen Mun Government Secondary School
Biology Quiz 8
Marking Scheme
(A) Choose the best answer. (10 marks)
1. D
2. D
6. B
7. A
3. B
8. C
4. C
9. B
5. B
10. B
(B) Answer the following questions. (30 marks)
* spelling must be correct
1. (a) Vegetative propagation does not require any external agents (1). Vegetative propagation is fast and
simple (1).
(b) Vegetative propagation does not involve pollination / fertilization / is an asexual reproduction while
flowers reproduction requires pollination / fertilization / is a sexual reproduction. (1)
Vegetative propagation does not involve any external agents while the reproduction of flowers
involve external agents such as wind or insect for pollination and/or animal or wind for seed
dispersal (1)
Vegetative propagation produces identical offspring without genetic variation while the reproduction
in flower produces offspring with genetic variation (1).
(Any 2, accept other differences between vegetative propagation and sexual reproduction in
flowers)
(c) (i) Potato (1). In winter, the potato plants die leaving its food storage organs - the potato in the soil (1).
In the next spring, the buds of the potato grow into adult plants using the food stored in potato (1),
It produces food with green leaves and stores food in new potatoes (1). (Any other example)
(ii) When the environment suddenly changes, the potato may not be able to survive (1).
Overcrowding occurs and the potato soon uses up the nutrients in the growing field. (1)
2. (a) (i) B (1)
(ii) C (1)
(iii) G (1)
(iv) D (1)
(b) (i) The flower is insect-pollinated. (1) It has a large petal to attract insects (1). It has insect guide to lead
the insects to take the nectar (1).
(ii) The stigma is longer than the anther, so the matured pollens will not fall on the anther easily (1).
(iii) An insect can look for and intake nectar from the central part of the flower (1). When it goes into the
flower, its body hair / leg / body part will pick up pollen grains from the flower (1). Then when it
goes to another flower of the same species (1), the pollen grain will stick on the stigma (1).
(iv) The pollen grain germinates and forms the pollen tube (1). The pollen tube grows and brings the male
gamete to the ovule through the micropyle. (1) The male nucleus enters the ovule and fuses with the
female gamete for fertilization. (1)
(c) C – *anther (1)
F – *style (1)
(d) (i) *seed (1) (ii) juicy part of fruit (1)
(e) F will wither and fall off (1)
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