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Zoology Exam Paper 2008 Attempt Three questions in all Question No. 1 (A) i. During inspiration the volume of thoracic cavity is increased. T ii. Papillary muscles are present at inner wall of the ventricles. T iii. Each human R.B.C contains 380 million haemoglobin molecules. F iv. The bile pigment, biliverdin contains red colour. F v. Ester bond is formed between carboxylic acid and amino group. F vi. In the class amphibia exoskeleton is absent. T Question No. 1 (B) Differentiate between the following: i. Retitae and Carinatae (02) ii. Chondrichthyes and Osteichthyes (02) Question No. 1 (C) Write detailed notes on any Two of the following: i. Proteins ii. Lipids iii. Carboh ydrates iv. Water Question No. 2 (A) Fill in the blanks with the correct answers: (03) i. The national animal of Pakistan is Markhor ii. The twisting of visceral mass at 1800 in mollusca is called torsion iii. The teeth of snake that bite are called f angs iv. The human lungs contains 700 million alveoli. v. In cartilaginous fishes the body is covered b y placoid scales. vi. Snakes have no limbs and no ears. Question No. 2 (B) i. Write a note on endoparasites of a human being. (02) ii. Write a note on Marsupial mammals. (02) Question No. 2 (C) Define Digestion. Describe the process of digestion in man.