BIOLOGY OF HIGHER SEED PLANTS 61 



d. Class experiment. Treat green leaves, stems, buds, or 

 flowers as indicated above for seeds. Observe and 

 record results and conclusions at the end of the 

 experiment as indicated under c. What precaution 

 is necessary where green plant parts are used ? 



NUTRITION AND SEASONAL LIFE 



1. Study the seasonal life of common plants like the potato, 



corn, onion or tulip, cherry tree, and locust tree, 

 a. Compare the seasonal life of the annuals with that of 

 the bean outlined in the text; that of the biennials 

 with that of the white sweet clover ; that of the per- 

 ennials with that of the locust and the apple. 



(1) What provision does each plant make for wintering ? 



for spring growth ? for summer activities and 

 storage ? Are the same physiological functions 

 characteristic of all plants at the same season in 

 a similar habitat ? Be able to state the main 

 functions or activities characteristic of the plant 

 in winter, spring, summer, and autumn. 



(2) Be able to construct drawings similar to those of 



the text, indicating the structures by which plants 

 winter and perform the activities of the spring 

 and summer seasons. 



(3) Summarize the dominant nutritive activities of plants 



in the different seasons. See Fig. 63 of text. 



C. TRANSPIRATION AND WATER ASCENT 

 TRANSPIRATION 



1. Record the loss of water from a leafy shoot placed in a 

 graduate or in a potometer made from a burette. Class 

 experiment. 



