Chapter 39-control Systems In Plants

11 Questions | By Jmerrick1213 | Last updated: Mar 21, 2022 | Total Attempts: 296

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A short quiz to test your knowledge on the control systems used by plants.

Questions and Answers

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