Quiz 5A KEY 07

Quiz 5A KEY 07 - procambium 6 True or false In a cross...

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BTNY 210, S2007 Name:___________________________ Lab day and time__________________ Quiz #5A KEY February 21, 2007 Circle the correct answer or write what is requested . 1. If you cut down a tree, what is the name of the tissue that makes up the bulk of the stem (basically all the wood)? xylem 2. What is the name of the single layer of cells that separate the wood from the bark? Vascular cambium 3. On the tree stump mentioned above, what is the cause of the dark color in the concentric, annual rings? Late wood (fall) has smaller, more dense cells with smaller lumen 4. True or false. There are clusters of cells in a tree trunk that actually conduct water, minerals, and gases horizontally through the tree. 5. True or false. The primary meristematic tissue in a root that eventually produces vascular tissue is the
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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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