Chapter 23 Vocab

3. part of a root system in which roots branch to such an extent that no single root grows larger than the rest
4. loss of water from a plant through its leaves
6. plant response to the relative lengths of light and darkness
8. specialized ground tissue found in leaves; performs most of a plant's photosynthesis
11. response of a plant to the force of gravity
13. tendency of a plant to grow toward a light source
15. fluid portion of the chloroplast, outside of the thylakoids
16. part on a growing stem where a leaf is attached
17. movement of a plant toward or away from stimuli

1. cluster of xylem and phloem tissue in stems
2. on or in a cell, a specific protein to whose shape fits a specific molecular messenger
5. response of a plant to touch
7. regulatory substance produced in the tip of a growing plant that stimulates cell elongation and the growth of new roots
9. single layer of cells that make up dermal tissues
10. chemical produced in one part of an organism that affects another part of the same organism
12. region of specialized cells responsible for continuing growth throughout a plant's lifetime
14. the primary root found in some plants that grow longer and thicker than the other roots