xviii THE PHYSIOLOGY OF REPRODUCTION 241 



QUESTIONS ON CHAPTER XVIII. 



1 i ) Give an account of the different ways in which plants propagate 

 themselves otherwise than by seed. (1898.) 



(2) Why is reproduction necessary in plants? Enumerate the two 

 ways by which plants propagate themselves. 



(3) Define what is meant by "sexual reproduction." How -does it 

 take place ? 



(4) What is the biological importance of sexual reproduction ? 



(5) Explain what is meant by the life-history of a plant. 



(6) Trace the history of an annual plant from the time of the germin- 

 ation of the seed until it dies. 



(7) How does the life-history of an annual plant differ from the life- 

 history of a biennial plant ? 



(8) Show in a graphic manner the life-history of 



(a) An annual plant. 



(b) A biennial plant. 



(c) A perennial plant, 



I, 



