Sclerophyllous foliage leaves like those in holly, barberry (Figure 6-37), and Yucca (Figure 6-38) have many unusual

Question:

Sclerophyllous foliage leaves like those in holly, barberry (Figure 6-37), and Yucca (Figure 6-38) have many unusual features. Do they live for 1 year or longer? They are more resistant to animals that might try to eat them. Why? What type of cells do they have that most leaves do not have?

Figure 6-37