Unformatted text preview: day plants to flower? 6. What is the name of the pigment that perceives the light that triggers the effects in question 5? 7. The name of the cell type that has only a thin primary cell wall, is living when mature, and can be found in many locations in stems, leaves, and roots: a. parenchyma b. collenchyma c. sclerencyma sclerid d. sclerenchyma fiber e. b and c are correct 8. Conifers contain only one type of water conducting cell, and it is called: a. vessel element b. sieve tube element c. companion cell d. tracheid e. none of the above 9. True or False. Xylem is composed of tracheids, vessels, and companion cells....
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- Spring '08
- Plant hormone, Xylem, Seed Germination