Question 1

Cytokinins interact with which other hormone?

Accepted Answer

A)   Ethylene
B)   Abscisic acid
C)   Gibberellins
D)   Auxins
E)   BrassinosteroidsF) A) and E)
G) A) and C)

Question 2

Use the following to answer questions :
Refer to the diagram below, showing an ethylene signal transduction pathway. 
-What is the first event that occurs after ethylene binds to its receptor?

Accepted Answer

Protein B ...

Question 3

Radishes are examples of cytokinins affecting _______ by causing pronounced swelling.

Accepted Answer

A)   roots
B)   stems
C)   leaves
D)   vegetative apical meristem
E)   floral apical meristemF) B) and D)
G) A) and B)

Question 4

Cytokinins are most abundant in which area of the plant?

Accepted Answer

A)   Tips of the shoot
B)   Leaves
C)   Stems
D)   Roots
E)   Lateral budsF) A) and D)
G) C) and D)

Question 5

Use the following to answer questions :
Refer to the diagram below, showing seed germination. 
-Where do the enzymes shown in seed 3 come from?

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Question 6

Etiolated seedlings are produced by germinating seeds that are kept in total darkness. Plants that are kept in the dark will begin to synthesize chlorophyll after they are given a pulse of

Accepted Answer

A)   blue light.
B)   red light.
C)   red light followed by a pulse of far-red light.
D)   far-red light followed by a pulse of red light.
E)   ultraviolet light.F) A) and D)
G) A) and E)

Question 7

If a shoot cutting is treated with auxin, which of the following is likely to result?

Accepted Answer

A)   Extensive root production
B)   Suppression of apical dominance
C)   Growth of lateral buds
D)   Bolting of the shoot
E)   FloweringF) B) and E)
G) C) and D)

Question 8

The "wall-loosening factor" from the cytoplasm is now believed to be

Accepted Answer

A)   auxins.
B)   cellulose-digesting enzymes.
C)   starch-digesting enzymes.
D)   expansins.
E)   calcium ions.F) A) and D)
G) A) and C)

Question 9

Bolting, or rapid stem elongation, is induced by

Accepted Answer

A)   auxin.
B)   abscisic acid.
C)   gibberellins.
D)   ethylene.
E)   cytokinin.F) A) and C)
G) B) and D)

Question 10

Gibberellins were discovered by the biologist Eiichi Kurosawa while he was studying the "foolish seedling" disease of _______, in which seedlings_______.

Accepted Answer

A)   corn; grow unusually slowly
B)   rice; grow into tall, spindly plants
C)   wheat; die after germination
D)   barley; produce seeds unusually early
E)   millet; have a beneficial mutationF) None of the above
G) A) and E)

Question 11

Eudicot seedlings form an apical _______ to protect the stem while it grows through the soil.

Accepted Answer

The answer of Eudicot seedlings form an apical _______ to...

Question 12

Explain how auxin distribution regulates phototropism and gravitropism.

Accepted Answer

Lateral distribution of auxin controls p...

Question 13

Which statement about the dormancy of seeds is false?

Accepted Answer

A)   Abrasion of the seed coat may break dormancy.
B)   Seeds often break dormancy when still attached to the parent plant.
C)   Exposure of seeds to fire may break dormancy.
D)   Light inhibits seed germination in some species.
E)   Soaking some seeds in water promotes germination.F) C) and D)
G) B) and D)

Question 14

To make seedless grapes grow to normal size, growers spray or treat them with

Accepted Answer

A)   cytokinins.
B)   nitric oxide.
C)   ethylene.
D)   auxin solution.
E)   gibberellin solution.F) D) and E)
G) A) and B)

Question 15

The likely result of treating a shoot cutting with auxin would be

Accepted Answer

A)   extensive root production.
B)   suppression of apical dominance.
C)   the growth of lateral buds.
D)   bolting of the shoot.
E)   nothing.F) All of the above
G) C) and D)

Question 16

Which of the following is an example or characteristic of plant tropisms?

Accepted Answer

A)   An imbalance in ethylene concentration causes curvature.
B)   Roots grow toward the light.
C)   One side of the root or shoot grows more rapidly than the other.
D)   DNA is the light receptor or gravity receptor.
E)   Auxin is the light receptor or gravity receptor.F) C) and D)
G) A) and C)

Question 17

Seeds

Accepted Answer

A)   take up water at the onset of germination.
B)   carry out extensive DNA synthesis in the early stages of germination.
C)   show a decrease in respiration as they germinate.
D)   carry out photosynthesis in the hypocotyl after germination.
E)   undergo extensive cell division in the early stages of germination.F) A) and C)
G) B) and E)

Question 18

What is the difference between the cytokinins kinetin and zeatin?

Accepted Answer

A)   Kinetin is found only in aged DNA, whereas zeatin is found only in fresh DNA.
B)   Kinetin is the active form of zeatin.
C)   Zeatin is the active form of kinetin.
D)   Only zeatin is a naturally occurring plant cytokinin.
E)   Zeatin is a synthetic cytokinin, whereas kinetin is natural.F) C) and D)
G) A) and B)

Question 19

Phytochrome

Accepted Answer

A)   is the only photoreceptor pigment in plants.
B)   exists in two forms interconvertible by light.
C)   is a pigment that is colored red or far-red.
D)   is a green-light receptor.
E)   is the photoreceptor for phototropism in coleoptiles.F) A) and B)
G) B) and D)

Question 20

The _______ transport of auxin establishes the orientation of growth and the _______ redistribution of auxin causes a growth response to an environmental stimulus that is called _______.

Accepted Answer

A)   polar; lateral; morphogenesis
B)   lateral; polar; tropism
C)   polar; lateral; tropism
D)   upward; downward; morphogenesis
E)   downward; upward; tropismF) B) and D)
G) A) and B)

Exam 37: Regulation of Plant Growth

Use the following to answer questions : Refer to the diagram below, showing an ethylene signal transduction pathway. -What is the first event that occurs after ethylene binds to its receptor?

Correct AnswerverifiedProtein B ...View AnswerShow Answer

The "wall-loosening factor" from the cytoplasm is now believed to be

Correct AnswerverifiedShow Answer

To make seedless grapes grow to normal size, growers spray or treat them with

Correct AnswerverifiedShow Answer

Eudicot seedlings form an apical _______ to protect the stem while it grows through the soil.

Correct AnswerverifiedShow Answer

Cytokinins are most abundant in which area of the plant?

Correct AnswerverifiedShow Answer

Radishes are examples of cytokinins affecting _______ by causing pronounced swelling.

Correct AnswerverifiedShow Answer

If a shoot cutting is treated with auxin, which of the following is likely to result?

Correct AnswerverifiedShow Answer

Gibberellins were discovered by the biologist Eiichi Kurosawa while he was studying the "foolish seedling" disease of _______, in which seedlings_______.

Correct AnswerverifiedShow Answer

The _______ transport of auxin establishes the orientation of growth and the _______ redistribution of auxin causes a growth response to an environmental stimulus that is called _______.

Correct AnswerverifiedShow Answer

What is the difference between the cytokinins kinetin and zeatin?

Correct AnswerverifiedShow Answer

Which statement about the dormancy of seeds is false?

Correct AnswerverifiedShow Answer

Etiolated seedlings are produced by germinating seeds that are kept in total darkness. Plants that are kept in the dark will begin to synthesize chlorophyll after they are given a pulse of

Correct AnswerverifiedShow Answer

Phytochrome

Correct AnswerverifiedShow Answer

Bolting, or rapid stem elongation, is induced by

Correct AnswerverifiedShow Answer

Explain how auxin distribution regulates phototropism and gravitropism.

Correct AnswerverifiedLateral distribution of auxin controls p...View AnswerShow Answer

Which of the following is an example or characteristic of plant tropisms?

Correct AnswerverifiedShow Answer

Cytokinins interact with which other hormone?

Correct AnswerverifiedShow Answer

Seeds

Correct AnswerverifiedShow Answer

Use the following to answer questions : Refer to the diagram below, showing seed germination. -Where do the enzymes shown in seed 3 come from?

Correct AnswerverifiedShow Answer

The likely result of treating a shoot cutting with auxin would be

Correct AnswerverifiedShow Answer

Correct Answer
verified
Protein B ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Gibberellins were discovered by the biologist Eiichi Kurosawa while he was studying the "foolish seedling" disease of _, in which seedlings_.

Correct Answer
verified

The ___ transport of auxin establishes the orientation of growth and the _ redistribution of auxin causes a growth response to an environmental stimulus that is called _____.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Lateral distribution of auxin controls p...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified