1. Which of the following constitutes the cellular components of the mammalian blood? I. Haemoglobin II. Erythrocytes III. Leucocytes IV. Platelets 14

2. Which of the following pairs of scientists discovered the Rhesus factor in human blood? 52

3. Improper sewage disposal could be dangerous for the following reasons except 49

4. The part of the nervous system that interprets blinking of the eye is the 20

5. Use the following information to answer Questions 54 and 55. In an experiment, a red-flowered plant was crossed with another red-flowered plant and the following results were obtained: 448 red flowers and 154 white flowers in the F1 generation. Which of the following represents the phenotypic ratio of the above genetic cross? 55