Selina ICSE Solutions for Class 9 Biology Chapter 11 - Digestive System Exercise 1 Multiple Choice Questions: 1. Pylorus is an opening from (i) oseophagus into stomach (ii) mouth cavity into stomach (iii) stomach into intestine (iv) intestine into rectum 2. Gastric juice contains (i) HCl and pepsin (ii) pepsin and trypsin (iii) trypsin and HCl (iv) amylopsin and pepsin 3. The water from the digested food is mainly absorbed by (i) stomach (ii) duodenum (iii) colon (iv) rectum 4. Which one of the following pairs of types of teeth perform one common function as stated against it? (i) Incisors, canines - Holding (ii) Canines, premolars - Biting (iii) Premolars, molars - Grinding (iv) Molars, incisors - Tearing Solution A. 1. (iii) stomach into intestine 2. (i) HCl and pepsin 3. (iii) colon 4. (iii) Premolars, molars – Grinding B. Very Short Answer 1. What is the dental formula of a normal human adult? Solution B.1. 2....
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