1918 



BIOLOGY 



Friday, June 21 2 p.m. Two hours 



Answer two questions from each group and four additional questions which may be 

 selected from any of the groups. 



Group I 



1. Compare bacteria, yeasts, and molds. 



2. (a) Name three tissues in the himian body that have to do with the function 



of movement. 

 (b) How is each tissue specially adapted for its work ? 



3. Describe the structure of some seed and explain the use of each part. 



4. Compare the respiratory organs of a tadpole, a frog, and a man, stating 



precisely what occurs in the process of respiration. 



5. Describe the principal appendages of an insect, stating the function of each, 



and naming the segment of the body to which each is attached. 



Group II 



6. Describe the process of reproduction of some alga which you have studied. 



7. Distinguish between the terms phylum (or branch), class, genus, and species. 



Illustrate these terms by giving the classification of some animal or plant 

 which you have studied. 



8. Trace the modifications which a piece of meat undergoes in being incorporated 



into the tissues of the human body. 



9. A bean seed was planted in May; from this seed a vigorous plant developed 



and reached full maturity before it was killed by frost in October. State 

 the most important periods of development and the chief events in the 

 life of this plant, noting what organs were most conspicuous at each 

 period. 



10. Describe the biological processes involved when an athlete starts to run at 



the sound of a pistol. 



Group III 



11. Show how molds affect human welfare. 



12. (a) Distinguish between the processes of fermentation and decomposition. 



(b) Name the kind of organism that causes each. 



(c) State how each process is of use to man. 



13. What is meant by Mendel's Law of Heredity ? 



14. Outline a dinner menu which is in accordance with war conditions and 



would at the same time supply adequate nutrition for a high-school student. 

 (Give reasons for your choice.) 



15. (a) Name the principal infectious diseases which may be obtained from 



(1) milk, (2) water, (3) dust of streets and pubhc places. 

 (6) Show how infection from these sources may be prevented by the individual 

 and by the civic authorities. 



