Unformatted text preview: procambium. 6. True or false . In a cross section of a root, the pith takes up most of the volume. 7. True or false . In the vascular bundles of a leaf the phloem is found above the xylem. 8. In a root, the inner most cell layer of the cortex has a specialized secretion of suberin around it’s perimeter. This cell layer is called the: a. epidermis b. pericycle c. phloem d. endodermis e. parenchyma 9. How many root hairs are on a four month old rye plant? a. 100 b. 1,000 c. 10,000 d. 100,000 e. more than 100,000 10. Why does one never see root hairs on the epidermis in the region of cell divisions, or the region of cell elongation, of a root. They only occur in the region of maturation. They would break off as the root elongated....
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This note was uploaded on 02/23/2012 for the course BTNY 210 taught by Professor Staff during the Spring '08 term at Purdue.
- Spring '08