Question 1

Which of the following statements best describes the movement of IAA in a shoot tip?

Accepted Answer

A)  IAA initially moves laterally from the shoot tip via polar transport.
B)  IAA initially moves laterally from the shaded to illuminated side of the shoot tip.
C)  IAA initially moves laterally from the illuminated to shaded side of the shoot tip.
D)  IAA initially moves laterally from the shoot tip via nonpolar transport.

Question 2

Where are abscisic acid receptors located in plant cells?

Accepted Answer

A)  in the cell wall
B)  in the cytoplasm
C)  in the endoplasmic reticulum
D)  in the plasma membrane

Question 3

A plant hormone has the same effect in different plant tissues.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following should prevent a grass seedling shoot from bending toward light?

Accepted Answer

A)  placing a translucent cap on the shoot tip
B)  placing an opaque cap on the shoot tip
C)  either removing the shoot tip or placing a translucent cap on the shoot tip
D)  either removing the shoot tip or placing an opaque cap on the shoot tip

Question 5

Which type of plant hormone is a gas at normal temperature and pressure?

Accepted Answer

A)  abscisic acid
B)  ethylene
C)  auxin
D)  salicylic acid

Question 6

Charles Darwin was the first person to discover the hormone auxin.

Accepted Answer

A) True 
 B)False

Question 7

Which type of plant hormone retards leaf aging?

Accepted Answer

A)  salicylic acid
B)  abscisic acid
C)  cytokinin
D)  ethylene

Question 8

Choose the type of plant chemical most closely associated with the action given below. Each chemical may be used more than once.
-inducing the synthesis of pathogenesis-related proteins

Accepted Answer

A)  jasmonates
B)  salicylic acid
C)  phytoalexins
D)  "antifreeze proteins"
E)  CHOICE BLANKF) CHOICE BLANK.G) oligosaccharins

Question 9

What is thigmotropism a growth response to?

Accepted Answer

A)  light
B)  day length
C)  contact with a solid object
D)  circadian rhythms

Question 10

What are chitinases examples of?

Accepted Answer

A)  systemins
B)  phytoalexins
C)  PR proteins
D)  R genes

Question 11

Which of the following terms describes plant activities that follow a biological clock so that they are based on cycles of about 24 hours?

Accepted Answer

A)  gravitropisms
B)  photoperiodisms
C)  thigmotropisms
D)  circadian rhythms

Question 12

If you were to start growing roses commercially, where would you probably want to set up your business?

Accepted Answer

Roses are day-neutral plants. They flowe...

Question 13

Which of the following types of plant hormones is apparently synthesized from carotenoid pigments inside plastids?

Accepted Answer

A)  salicylic acid
B)  cytokinins
C)  abscisic acid
D)  jasmonate

Question 14

Which plant hormones can be produced by boiling DNA?

Accepted Answer

A)  salicylic acids
B)  auxins
C)  cytokinins
D)  abscisic acids

Question 15

How does the application of gibberellin affect monoecious species of plants (plants that have separate "male" and "female" flowers both on the same plant) ?

Accepted Answer

A)  It causes all flowers formed to be "female."
B)  It encourages proportionately more "male" flowers to develop.
C)  It causes all flowers formed to actually be both "male" and "female."
D)  It causes all flowers formed to be "male."

Question 16

Suppose you are culturing tobacco in a petri dish at a 10:1 ratio of auxin to cytokinin. What would you do in order to promote only shoot development?

Accepted Answer

A)  increase the cytokinin ratio
B)  increase the auxin ratio
C)  reduce the auxin level significantly and increase the cytokinin level slightly
D)  grow the tobacco in the dark

Question 17

Which plant hormones appear to regulate the expression of genes associated with a plant's growth responses to light?

Accepted Answer

A)  salicylic acids
B)  brassinosteroids
C)  gibberellins
D)  jasmonates

Question 18

Which type of plant hormone is generally responsible for long-term inhibition of plant growth such as in buds and seeds?

Accepted Answer

A)  gibberellin
B)  oligosaccharine
C)  brassinosteroid
D)  abscisic acid

Question 19

Imagine that you want all of the orange trees in your orchard to uniformly flower and set fruit. Which type of plant hormone should you spray on your plants?

Accepted Answer

A)  brassinosteroid
B)  auxins
C)  ethylene
D)  salicylic acid

Question 20

Chrysanthemums are short-day plants, requiring a night length of longer than 12 hours to flower. Under which of the following conditions should chrysanthemums flower?

Accepted Answer

A)  night length 14 hours, day length 10 hours
B)  night length 10 hours, day length 14 hours
C)  night length 14 hours, day length 10 hours; night interrupted in the middle by an intense red flash
D)  night length 10 hours, day length 14 hours; day interrupted in the middle by half an hour of darkness

Exam 38: Plant Signals and Responses to the Environment

Suppose you are culturing tobacco in a petri dish at a 10:1 ratio of auxin to cytokinin. What would you do in order to promote only shoot development?

Correct AnswerverifiedShow Answer

Which type of plant hormone retards leaf aging?

Correct AnswerverifiedShow Answer

Imagine that you want all of the orange trees in your orchard to uniformly flower and set fruit. Which type of plant hormone should you spray on your plants?

Correct AnswerverifiedShow Answer

Which of the following types of plant hormones is apparently synthesized from carotenoid pigments inside plastids?

Correct AnswerverifiedShow Answer

How does the application of gibberellin affect monoecious species of plants (plants that have separate "male" and "female" flowers both on the same plant) ?

Correct AnswerverifiedShow Answer

Choose the type of plant chemical most closely associated with the action given below. Each chemical may be used more than once. -inducing the synthesis of pathogenesis-related proteins

Correct AnswerverifiedShow Answer

Which type of plant hormone is generally responsible for long-term inhibition of plant growth such as in buds and seeds?

Correct AnswerverifiedShow Answer

Which plant hormones can be produced by boiling DNA?

Correct AnswerverifiedShow Answer

Which of the following terms describes plant activities that follow a biological clock so that they are based on cycles of about 24 hours?

Correct AnswerverifiedShow Answer

Where are abscisic acid receptors located in plant cells?

Correct AnswerverifiedShow Answer

Which of the following statements best describes the movement of IAA in a shoot tip?

Correct AnswerverifiedShow Answer

A plant hormone has the same effect in different plant tissues.

Correct AnswerverifiedShow Answer

Chrysanthemums are short-day plants, requiring a night length of longer than 12 hours to flower. Under which of the following conditions should chrysanthemums flower?

Correct AnswerverifiedShow Answer

What are chitinases examples of?

Correct AnswerverifiedShow Answer

Which plant hormones appear to regulate the expression of genes associated with a plant's growth responses to light?

Correct AnswerverifiedShow Answer

If you were to start growing roses commercially, where would you probably want to set up your business?

Correct AnswerverifiedRoses are day-neutral plants. They flowe...View AnswerShow Answer

What is thigmotropism a growth response to?

Correct AnswerverifiedShow Answer

Which of the following should prevent a grass seedling shoot from bending toward light?

Correct AnswerverifiedShow Answer

Which type of plant hormone is a gas at normal temperature and pressure?

Correct AnswerverifiedShow Answer

Charles Darwin was the first person to discover the hormone auxin.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Roses are day-neutral plants. They flowe...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified