APPENDIX 407 



8. How do plants obtain their food and in what form ? 

 State clearly the experimental evidence upon which your 

 statements are based. 



9. Give an account of the life-history of the Potato, and show 

 clearly, with the aid of sketches, on what part of the plant 

 the tubers are formed. Describe the structure of the Potato 

 tuber. 



10. What experiments could you devise to show how the 

 rate of transpiration of water from a leafy plant compares 

 with the rate of absorption of water by its roots ? Upon what 

 external conditions does the activity of transpiration depend ? 



1 1 . Describe some of the common methods by which weeds 

 are spread. Illustrate your answer by description of three 

 specific instances of different methods. 



12. Describe the structure of the flowers in two plants 

 which are cross-pollinated by the wind, and in two plants which 

 are cross-pollinated by insects. State clearly what experi- 

 mental evidence there is for the statement that, in many cases, 

 cross-pollination is more effective than self-pollination in the 

 production of seeds. 



BOARD OF EDUCATION TEACHERS' CERTIFICATE 



Examination, Nov. 191 1 

 Special Section C. Botany 



7. On cutting across the stem of a plant, such as the Sun- 

 flower, Begonia, or Pelargonium, it is found, after a short time, 

 that water exudes from the cut end of that part of the stem 

 which remains attached to the root. Account so far as you 

 can for this phenomenon, and describe any experiment which 

 will throw light upon it. 



8. What is meant by ' vegetative reproduction in plants ' ? 

 Give examples of four different methods of vegetative repro- 

 duction. Illustrate your answer by sketches. 



9. How would you demonstrate the conditions which deter- 

 mine the formation of starch in leaves ? 



10. Give sketches of the leaves of any three of the following : 

 Gorse, Dog-Rose, Wood Sorrel, Marsh Marigold, Primrose. 

 Account for any peculiarities of structure observed. 



