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Unformatted text preview: composed of tracheids, vessels, and companion cells. 5. True or False . The dark lines that we call annual rings of a tree represent early wood. 6. Primary growth in plants causes increase in: a. Width b. Circumference c. Length d. Leaves e. None of the above 7. One of the secondary meristems in plants is the: a. Apical meristem b. Axillary bud c. Vascular cambium d. Abscission layer e. Protoderm 8. The vascular cylinder in roots is separated from the cortex by a tissue called: endodermis 9. Name the tissue that gives rise to branch roots. pericycle 10. What is the driving force for transpiration? diffusion...
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- Spring '08