Chapter 39-control Systems In Plants
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A short quiz to test your knowledge on the control systems used by plants.
- 1.What does auxin do to plants?
- A.
Inhibits growth
- B.
Promotes elongation
- C.
Ripen fruits
- D.
Fights disease
- 2.If apical dominance is removed from a plant, what results?
- A.
The plant stops growing
- B.
The plant grows upward
- C.
The plant germinates
- D.
The plant grows outward
- 3.Plants shed leaves regularly. This is apoptosis (programmed cell death) in plants. It is prompted by
- A.
Ethylene
- B.
Gibberelins
- C.
Auxins
- D.
Cytokinins
- 4.Far red absorbing phytochrome is _______ in color and influences ____________.
- A.
Red, closing of the stomata
- B.
Red-yellow, flowering
- C.
Violet, ripening
- D.
Blue-green, germination
- 5.Response to touch, that allows a plant to react by becoming flaccid or curling around a pole is
- A.
Gravitropism
- B.
Thigmotropism
- C.
Statoliths
- D.
Geotropism
- 6.The primary purpose of abscisic acid in seeds is
- A.
Dormancy
- B.
Germination
- C.
Organogenesis
- 7.When do short day plants flower?
- A.
Spring and early summer
- B.
Late summer and fall
- C.
Fall and winter
- D.
Winter and early spring
- 8.Which of the following does ethylene not do?
- A.
Abscission
- B.
Cuticle production
- C.
Leaf loss
- D.
Auxin opposition
- 9.The receptor protein for greening is
- A.
Cytochrome
- B.
Cryptochrome
- C.
Phytochrome
- D.
Chlorochrome
- 10.Auxin causes elongation by
- A.
Activating expansins to loosen H bonds between cellulose fibers
- B.
Inhibiting dormancy
- C.
Activating enzymes to amplify the phytochrome signal
- D.
Initiating chlorophyll production
- 11.Which hormone is produced by plants to break seed dormancy?
- A.
Auxins
- B.
Gibberelins
- C.
Abscissic acid
- D.
Cytokinins
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