Unformatted text preview: Root grows downward (positive gravitropism) Root and stem branching Apical dominance Development of fruit and seed Fruit ripening Senescence Bud dormancy 2. What affect does auxin have on cell elongation in stems? In roots? 3. How does a plant sense gravity? 4. What environmental cue regulates flowering in many temperate zone plants? 5. What are the 2 things a plant needs to measure darkness? 6. What is the light detecting system in plants? 7. How do plants “summon body guards” and “warn their neighbors”?...
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- Spring '07
- Biology, life cycle event, plant hormone senescence