Chapter 19

2. These plants require long periods of darkness to trigger blooming
3. An example of this is when plants appear to be infested with insect eggs to prevent being colonized
4. Allows plants to keep track of day length so they know when to go dormant or produce flowers
9. Blooming in these plants is not controlled by the amount of light the plant receives. Controlling factors might be temperature or reaching maturity
11. Waxes, saps, thorns, spines, and hairs are all kinds of blank defenses
14. Stimulate stem elongation and control seedling orientation. Stimulates root branching and cause plants to lean toward the sun

1. Auxins move blank from light
2. Auxins move toward blank that sink downward in response to gravity. This encourages the plant to grow in the direction opposite gravity
4. Cells in a plant's stem grow unevenly causing the stem to bend towards the light maximize photosynthesis as a result of blank
5. Increases speed of fruit ripening, stimulates leaf dropping and flower death. Bananas produce a lot of this hormone
6. Some plants can blank salt through their leaves to deal with living in saline environments
7. Gibberellins are applied to seedless grapes to blank the fruit to a size comparable with seeded grapes
8. Plants uses these to store salts so they can survive in salty environments
10. compounds Compounds prided by plants that other species take advantage of. Humans use them for spices and medicines
12. This acid inhibits plant growth and stimulates the closure of stomata
13. Plants have succulent leaves, deep taproots, and long dormant seeds to help them survive in these hot dry climates