1. A
   skin
2. B
   tongue
3. C
   inner lining of nose
4. D
   inner ear

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1. A
   Ovary
2. B
   Pituitary
3. C
   Testes
4. D
   Adrenal

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1. A
   Thymus
2. B
   Pancreas
3. C
   Adrenal
4. D
   Liver

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1. A
   medulla in fore brain
2. B
   medulla in spinal cord
3. C
   medulla in mid brain
4. D
   medulla in hind brain

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1. A
   Adrenal
2. B
   Ovary
3. C
   Testis
4. D
   Pituitary

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1. A
   Estrogen - Ovary
2. B
   Testosterone - Testes
3. C
   Adrenaline - Pituitary gland
4. D
   Thyroxin - Thyroid gland

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1. A
   cell junction
2. B
   neuro muscular junction
3. C
   neural joint
4. D
   synapse

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1. A
   Scurvy
2. B
   Diabetes
3. C
   Common cold
4. D
   Typhoid

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1. A
   endocrine and digestive systems
2. B
   respiratory and nervous systems
3. C
   reproductive and endocrine systems
4. D
   nervous and endocrine systems

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

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1. A
   (i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
2. B
   (i) - (d), (ii) - (a), (iii) - (c), (iv) - (b)
3. C
   (i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
4. D
   (i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)

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1. A
   (i) - (a), (ii) - (c), (iii) - (b), (iv) - (a)
2. B
   (i) - (d), (ii) - (a), (iii) - (c), (iv) - (b)
3. C
   (i) - (a), (ii) - (c), (iii) - (b), (iv) - (a)
4. D
   (i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)

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1. A
   (i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
2. B
   (i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
3. C
   (i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)
4. D
   (i) - (d), (ii) - (a), (iii) - (c), (iv) - (b)

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1. A
   (i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
2. B
   (i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
3. C
   (i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)
4. D
   (i) - (d), (ii) - (a), (iii) - (c), (iv) - (b)

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1. A
   (i) - (c), (ii) - (b), (iii) - (d), (iv) - (a)
2. B
   (i) - (a), (ii) - (c), (iii) - (b), (iv) - (d)
3. C
   (i) - (d), (ii) - (a), (iii) - (b), (iv) - (c)
4. D
   (i) - (b), (ii) - (d), (iii) - (a), (iv) - (c)

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1. A
   Lungs
2. B
   Trachea
3. C
   Spiracles
4. D
   Gills

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1. A
   Fermentation
2. B
   Boiling
3. C
   Spoilage
4. D
   Heating

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

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

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1. A
   (b) and (c)
2. B
   (c)
3. C
   (a) and (d)
4. D
   (b) and (d)

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

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1. A
   They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart
2. B
   They have thick elastic walls, blood flows under low pressure; carry blood from different organs of the body
3. C
   They have thick elastic walls without valves inside, blood flows under high pressure and carry blood away from the heart to different parts of the body
4. D
   They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body

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1. A
   Secreted by bile duct and stored in liver
2. B
   Secreted by gall bladder and stored in liver
3. C
   Secreted by liver and stored in bile duct
4. D
   Secreted by liver and stored in gall bladder

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1. A
   They convert CO₂ and water into carbohydrates in the absence of sunlight
2. B
   They store carbohydrates in the form of starch
3. C
   They constitute the first trophic level in food chains
4. D
   They synthesize carbohydrates from CO₂ and water in the presence of sunlight & chlorophyll

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

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