1. A
   Movement of ribs downward and inward
2. B
   Contraction of the diaphragm muscles
3. C
   Relaxation of the external intercostal muscles
4. D
   Decrease in the volume of the lungs

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1. A
   Chloroplasts
2. B
   Nucleus
3. C
   Cell wall
4. D
   Epidermal cells

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1. A
   A
2. B
   B
3. C
   C
4. D
   D

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1. A
   only epidermal cells
2. B
   guard cells and epidermal cells
3. C
   guard cells, epidermal cells and stoma
4. D
   only guard cells

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1. A
   Z
2. B
   W
3. C
   X
4. D
   Y

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1. A
   Movement of ribs downward and inward
2. B
   Contraction of the diaphragm muscles
3. C
   Relaxation of the external intercostal muscles
4. D
   Decrease in the volume of the lungs

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1. A
   (ii), (iii) and (iv) only
2. B
   (i) and (iii) only
3. C
   (ii) and (iv) only
4. D
   (i), (ii) and (iii) only

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1. A
   (B)
2. B
   (A)
3. C
   (C)
4. D
   (D)

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1. A
   Q receives deoxygenated blood from Y.
2. B
   Y receives blood from lungs.
3. C
   The blood from Y reaches lungs.
4. D
   The blood from body enters heart through P.

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1. A
   stomata surrounded by several guard cells each
2. B
   stomata surrounded by several epidermal cells
3. C
   stomata surrounding by a pair of guard cells each
4. D
   stomata surrounding many guard cells

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1. A
   Y contains ribosomes that synthesise proteins required by Z.
2. B
   Y provides the carbohydrates that are transported by Z.
3. C
   Y transports sucrose, while Z transports water and minerals.
4. D
   Y helps to filter the liquid transported in Z to facilitate translocation.

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1. A
   Option a
2. B
   Option b
3. C
   Option c
4. D
   Option d

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1. A
   Levels of the hormone represented by graph P would be higher than normal.
2. B
   Fertilisation of ovum would fail to occur.
3. C
   There would be no significant effect since the functions of the hormones overlap.
4. D
   The uterine lining might not be sufficiently stable for implantation of fertilised ovum.

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1. A
   I, II, III, V, IV
2. B
   I, II, III, IV, V
3. C
   I, III, V, II, IV
4. D
   I, III, II, V, IV

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1. A
   pseudopodia formation in Amoeba
2. B
   formation of daughter cells in Yeast
3. C
   binary fission in Amoeba
4. D
   bud formation in Yeast

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1. A
   C
2. B
   B
3. C
   D
4. D
   A

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1. A
   B
2. B
   D
3. C
   C
4. D
   A

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1. A
   D
2. B
   C
3. C
   A
4. D
   B

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1. A
   I
2. B
   III
3. C
   II
4. D
   IV

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1. A
   B
2. B
   A
3. C
   D
4. D
   C

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1. A
   I and III
2. B
   II and IV
3. C
   I and IV
4. D
   I and II

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1. A
   I
2. B
   III
3. C
   II
4. D
   IV

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1. A
   Formation of bud taking place in Amoeba
2. B
   formation of spores in Amoeba
3. C
   identical gametes being formed in Amoeba
4. D
   formation of daughter cells in Amoeba

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1. A
   A
2. B
   D
3. C
   C
4. D
   B

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1. A
   A
2. B
   B
3. C
   C
4. D
   D

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