CONTENTS 



PROBLEM 



V. Plant Growth and Nutrition. Causes of Growth 



25. To find the relation of tlie embryo to tlie food supply 



26. To test for starch 



27. To test for grape sugar 



28. To test for fats and oils 



29. To test for proteins or nitrogenous foods 



30. To test for the presence of mineral matter (Optional) 



31. To test for the presence of water .... 



32. To test various food substances for the organic nutrients (Home work) 



33. To show how much water is needed to make a seed germinate (Home 



experiment) ........... 



34. To determine the temperature best fitted to cause peas to germinate 



(Home experiment) ........ 



35. To show that seeds need some part of the air in order to grow 



36. To show that food is needed by the embryo in order to grow 



37. Is any part of the air necessary for combustion ? (Demonstration) 



38. To test for oxygen (Demonstration) 



39. To test for carbon 



40. To test for carbon dioxide 



41 . To prove that organic substances are oxidized within the human body 



42. To prove that growing seeds oxidize food .... 



43. To study the fruit of the corn plant 



44. To study the structure of a grain of corn . . . . 



45. To find the use of the endosperm of the corn grain 



46. To find whether starch or grape sugar will dissolve in water 



47. To find how the young plant makes use of the food supply. Digestion 



48. What changes take place in starchy foods in the mouth ? (Demon 



stration) ..." 



49. Conditions necessary for the action of diastase . . . '. 



50. What is the reason for digestion of starch in the corn grain ? 



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VI. The Organs of Nutrition in Plants — The Soil and its 



Relation to the Roots .... 



To find out the structure of roots ....... 



To determine the influence of gravity on the direction of growth of 

 roots ........... 



To find the effect of water on the growth of roots 

 To study the structure and purpose of root hairs 



55. To discover how fluids travel through roots and stems 



56. To find out how root hairs absorb soil water .... 



57. To determine what kind of substances will pass through a membrane 



58. To test organic material in soil ....... 



59. To find what kind of soil holds water best 



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