Across
- 1. replaces epidermis when cork cambium begins producing new tissue.
- 3. conducts dissolved food materials produced by photosynthesis throughout the plant. composed of sieve-tube members, companion cells, fibers, parenchyma cells, and ray cells
- 6. a protective layer covering all plant organs
- 10. most complex tissues are produced by
- 12. forms callus plug- prevents leaking of sieve tube contents when cell injured
- 13. lack secondary cell walls and nuclei. Walls have sieve plates with small pores
- 17. have stomata bordered by pairs of guard cells
- 19. composed of two or more kinds of cells
- 20. loosely arranged pockets of parenchyma cells formed by cork cambium that protrude through the surface of periderm. Allows for gaseous exchange
Down
- 2. produce root hairs and increase absorptive area of root surface
- 4. may function individually or as part of a secretory tissue
- 5. function in lateral conduction and food storage
- 7. tapered at the ends with pairs of pits that allow water to pass from cell to cell. Dead at maturity
- 8. conducting tissue for water and minerals that are absorbed by the roots
- 9. scattered in tissue; include stone cells
- 11. have been used by humans for thousands of years as rope, string, canvas, textiles, etc
- 14. plants
- 15. secreted on the cuticle
- 16. long tubes made of vessel elements
- 18. fatty substance on the surface of outer walls of epidermis that form cuticle
- 21. cells narrow, tapered cells associated with sieve tube members