124 NATV RE-STUDY LESSONS. 



8. Draw : 



(a) The embryo of the bean in different positions. 

 {b) The embryo with one cotyledon cut away so as 



to show the caulicle and plumule. 

 (c) The caulicle and plumule as seen under a lens. 



Name each part as it is drawn. 



9. {a) Examine the pea and compare it as to markings 



and contents with the bean. 

 {b) Draw the parts observed as in the bean. 

 C. Dicotyledonous Seeds. 



10. {a) Treat the castor-bean in a similar manner to 



the pea and the bean, and examine it as to 

 color, shape, external markings, number and 

 kinds of coats. 



(b) How many parts are found within ? 



(c) Describe the form and relative position of each 



part. 



(d) Draw the parts and name them as in the case 



of the bean and pea. 



11. (a) Describe minutely the appearance of the inner 



surfaces of the two halves of the inner por- 

 tion of the seed. 



(3) Make a drawing of one of these surfaces, 

 marking in all the lines you observe. 



(c) What does this face resemble ? 



12. {a) By means of a sharp knife try to remove this 



thin face. 



{b) Are these leaf-like surfaces separable from the 



part underneath ? 



These thin, leaf-like bodies are the cotyledons and the two thickened 

 masses on which they lie are the food for the development of the seed. 

 This food is called albumen. 



13. Where are the cotyledons situated in relation to 

 the two whitish bodies ? 



