92 GENERAL BIOLOGY. 



3. Buckwheat. 



4. Mustard. 



B. Comparison of different kinds of seedlings. 



(After examining and sketching the second com- 

 pare it with the first. In like manner compare 

 the third with the first and second, and the 

 fourth with the first, second, and third.) 



1. Compare the roots. 



2. Has each a stem supporting the cotyledons 



(hypocotyl) ? 



3. Compare the cotyledons : 



(a) In regard to form and size. 



(b) What might be inferred as to their 



function ? 



4. Compare the cotyledons of the pea and of 



the bean. 



5. Compare the pea and the buckwheat as to the 



time of appearance of the foliage leaves. 

 To what may the difference be due ? 

 II. Monocotyledons. 



Observe and compare different stages of the 

 following forms : 



1. Indian corn. 



2. Wheat. 



HI. Compare the seedlings studied in I. with those 

 in II. 



1. Observe the number of cotyledons. 



2. Compare their form with that of the foliage 



leaves. 



