Chapter 19!

2. plants require long periods of darkness to trigger blooming (two words, hyphenated)
6. special form of phototropism causing the plant to exhibit solar tracking.
7. saps, thorns, spines, and hairs are all kinds of _____ defenses.
9. the speed of seed germination, promotes stem elongation and induces early blooming
11. stem elongation and control seedling orientation. Stimulates root branching and cause plants to lean toward the sun
12. produced by plants that other species take advantage of. Humans use them for spices and medicines
14. plants to keep track of day length so they know when to go dormant or produce flowers.
16. in a plant's stem grow unevenly causing the stem to bend towards the light maximize photosynthesis as a result of ________.
18. these plants, flowering is triggered by shorter periods of darkness (two words, hyphenated
20. use these to store salts so they can survive in salty environments
21. are applied to seedless grapes to _____ the fruit to a size comparable with seeded grapes
23. rapid cell division. Initiate new branches from lateral buds

1. plants exhibit a growth response to touch, or physical contact with objects. This kind of response is called ________.
3. move toward _____ that sink downward in response to gravity. This encourages the plant to grow in the direction opposite gravity
4. play a large role in controlling this growth response to gravity
5. plants can _____ salt through their leaves to deal with living in saline environments
8. plants to respond to environmental cues by turning certain genes on or off.
10. speed of fruit ripening, stimulates leaf dropping and flower death. Bananas produce a lot of this hormone
13. in these plants is not controlled by the amount of light the plant receives. Controlling factors might be temperature or reaching maturity
15. have succulent leaves, deep taproots, and long dormant seeds to help them survive in these hot dry climates.
17. acid inhibits plant growth and stimulates the closure of stomata
19. example of this is when plants appear to be infested with insect eggs to prevent being colonized
22. move ______ from light