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1919 



ZOOLOGY 



Friday, June 20 2 p.m. Two hours 



Answer three questions from each group, and one additional question which may be 

 selected from any group. Nxunber each answer to correspond with the question selected. 



Group I 



1. Make a labeled drawing of the alimentary canal of a bird or of a fish. 



2. Describe, or illustrate by a carefully labeled diagram, the mouth parts of an 



insect, stating the function of each organ. 



3. Explain the structure of the human stomach and describe the work which this 



organ performs, stating the effect on foodstuffs of each of its secretions 



4. How are homologous structures adapted to diverse uses in the human hand 



and foot? 



5. In connection with the frog name and locate: (a) two types of joints, (b) two 



types of muscles, {c) two ductless glands, (d) two kinds of nerves, (e) two 

 digestive glands. 



Group II 



6. Account for five of the following facts and indicate in each instance the animal 



concerned: 



a) Larger nimiber of sperms than eggs. 



b) Open valve in dead bivalve molluscs. 



c) Absence of gills in certain aquatic animals. 



d) Absence of mouth parts in certain adult animals. 



e) Dentition with cusps. 



/) Degenerate vermiform appendix. 



7. Describe the reproduction of Paramecium. 



8. Define each of the following terms: (a) natural selection, (b) Mendelism, 



(c) anesthetics, (d) trichinosis, (c) flagellum, (/) hermaphroditic, (g) reflex, 

 (h) gastrula, (i) asexual, (J) respiration. 



9. Describe the development of the frog or toad from the time of egg-laying to 



the adult stage. 



10. (a) What nutrients are needed in a normal diet ? 



(6) State the principal use to the organism of each nutrient mentioned. 



(THIS EXAMINATION IS CONTINUED ON PAGE 2) 



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