Unformatted text preview: 6. True or False . When you cut a tree down and see growth rings in the stump, the dark lines that represent the rings are from “early wood”, produced when there is a lot of water to promote growth. 7. What is secondary growth? Growth in Diameter 8. What layer of cells gives rise to the secondary xylem and phloem? Vascular Cambium 9. What is the name of the layer of cells that surrounds and protects the vascular cylinder? Endodermis 10. True or False . Transpiration of water in plants requires energy in the form of ATP....
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- Spring '08
- Xylem, Vascular plant, Plant anatomy, main cell type, Diameter Vascular Cambium