THE PLANT WORLD. 119 



takes in, prepares the carbon for the use of the plant and sets the 

 oxygen free. 



35. Some of the lowest orders of plants have the power of mov- 

 ing, especially those living in water. Some are long, thin in shape, 

 thus facilitating locomotion. Plant w^ork is to use the waste matters 

 of man, to supply food for him, and to serve him in many other ways. 

 Man would not be able to live without the plants which use the poison- 

 ous gas he emits, purifying the air, and also furnish oxygen. 



The following are the questions for the examination for the class 

 of 1900. 



1. AVhat are the Conditions for Germination? 



2. What are the Uses of the Plant Organs? 



3. How are Petioles sometimes Modified? 



4. Contrast Transpiration with Respiration. 

 6. How is Mesophyll Protected? 



6. Give Instances under the Three Types of Stems. 



7. Describe Section of two year old stem — Dicotyledon. 



8. How may plants Ward off Enemies? 



9. What is Velamen? 



10. Name (1) a Plumed Seed; (2) Winged Seed; (3) Barbed 

 Seed. 



11. How may Hydrotropism be shown? 



12. What is the Meaning of Protandry? 



13. What are Parasites? 



14. Why do we have Early Flowering Herbs in Rich Woodland? 



15. What are Carnivorous Plants? 



16. What are Gametes? 



17. What are Xerophytes? 



18. How may a plant Prepare for Winter or Drouth? 



19. Compare a Cactus Desert with a Thicket. 



20. What are some of the Characteristics of a Prairie Flora? 



The brother, presumably a year younger at the time of examina- 

 tion than the student whose answers were previously given, replied as 

 follows: 



I. For Germination there is reijuired heat, moisture, and oxygen 

 passing between the soil particles. The heat is obtained from the 

 warmth of the soil itself and the moisture comes from the soil where 

 it is contained as adhesive water or soil water. The oxygen passes 

 through the little spaces l)etween the soil particles. 



