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1781. Which of the following structures are associated with the sense of balance in mammals ?
A. Cochlea and tympanum
B. Oval window and ear lobes
C. Ampulla and semicirular canals
D. Eustachial tube and nasal passage
Explanation:
1782. In Homo sapiens, fertilisation occurs in the
A. uterus
B. ovary
C. vagina
D. oviduct
Explanation:
1783. Which among the following are known for cooperation and division of labour ?
A. Fire flies
B. Cockroaches
C. Ants
D. Bed bug
Explanation:
1784. The presence of which of the following salts in water causes corrosion in steam boilers ?
A. Sodium chloride
B. Magnesium chloride
C. Calcium bicarbonate
D. Potassium bicarbonate
Explanation:
1785. Which of the following is a mixed gland (i. e which secretes both enzymes and hormones) ?
A. Salivary
B. Thyroid
C. Liver
D. Pancreas
Explanation: