Biology Chapter 20: Plant Support and Transport

Vocabulary	Objectives
20:1  Stem Structure	page 420
herbaceous stem cortex woody stem cork cambium terminal bud annual ring	Discuss the traits of herbaceous stems. Describe the five layers of woody stems. Compare herbaceous and woody stems. Explain how stems grow. If you put a nail in a tree and come back 20 years later, where will the nail be? Why?
20:2  The Jobs of Stems	page 424
(no new words)	Explain how a stem serves as a transport system. Explain how biologists think water gets from the roots to the leaves. Discuss the storage function of stems. Identify how stems are useful to humans.
20:3  Root Structure	page 428
taproot fiborous root root hair endodermis	Compare taproots and fiborous roots. Sequence the layers of root cells. Describe how root grows.
20:4  The Jobs of Roots	page 431
(no new  words)	Describe root hairs and their function. Relate how roots anchor the plant and  store nutrients. Discuss the benefits and problems of roots. What things must be considred before you plant a tree?  Why?