38 SOUTH AFRICAN BOTANY 
Briefly describe the origin of lateral roots, and root-hairs. 
What are the functions of the latter ? 
2. Compare the root of a typical monocotyledon, e.g. mealie, 
with that of a typical dicotyledon, e.g. bean. 
3. Give a description (accompanied by sketches) of the longi- 
tudinal section of any-root you have examined under the 
microscope. Include the apex and the characteristic lateral 
outgrowths. 
4, How would you be able by examination of the root alone 
to distinguish a monocotyledon from a dicotvledon ? 
5. Name three functions of the root and describe two forms 
of modified roots. 
