Question 1

Certain trees tend to grow straight and tall with few lateral branches when compared to other trees.In these trees

Accepted Answer

A)  lateral buds are overactive.
B)  lateral bud development is dependent on temperature.
C)  more gibberellins are produced compared to trees with many lateral branches,and the gibberellins affect the buds detrimentally.
D)  more auxins are produced compared to trees with many lateral branches,and the auxins inhibit lateral bud development.E) A) and C)
F) A) and B)

Question 2

The response to touch by such plants as the sensitive plant is due to:

Accepted Answer

A)  changes in water content of cells.
B)  auxin displacement in the touched area.
C)  effect of gibberellins on the area affected.
D)  sensitive responder cells.E) C) and D)
F) A) and D) A

Question 3

Gravitropism is defined as:

Accepted Answer

A)  growth in response to the Earth's magnetic field.
B)  gravity's pull on certain plant organs.
C)  growth in response to the force of gravity.
D)  any response to gravity that changes cell structures.
E)  growth mostly away from gravity.F) B) and E)
G) C) and D)

Question 4

Which sequence of events is true about phtyochrome?

Accepted Answer

A)  Red light activates phytochrome,converting it to Pfr,activated Pfr moves to the nucleus,then Pr is a receptor for red light in the cytosol.
B)  Pr is a receptor for red light in the cytosol,red light activates phytochrome,converting it to Pfr,then activated Pfr moves to the nucleus.
C)  Pr is a receptor for red light in the cytosol,activated Pfr moves to the nucleus,then red light activates phytochrome,converting it to Pfr.D) A) and B)
E) A) and C)

Question 5

Ethylene has the effect of causing fruits to:

Accepted Answer

A)  enlarge
B)  ripen
C)  shrink
D)  elongate
E)  increase in juice contentF) B) and D)
G) A) and E)

Question 6

Several plants of the same type are grown individually under separate glass covers.One plant is attacked by a herbivore.This plant will be able to use __________ to induce defenses in _________ but not _________.

Accepted Answer

A)  Jasmonic acid;nearby plants;itself
B)  Systemin;nearby plants;itself
C)  Jasmonic acid;itself;nearby plants
D)  Auxin;itself;nearby plantsE) None of the above
F) C) and D)

Question 7

Abscisic acid is an important signal,transported from roots to the stem and leaves during times of water stress,that prevents:

Accepted Answer

A)  additional auxin production.
B)  ethylene buildup in the stems.
C)  leaf drop.
D)  phototropism.
E)  stomatal opening.F) A) and E)
G) None of the above

Question 8

Plant hormones bind specific cellular receptor molecules that trigger gene expression responses.Which statement is correct concerning these responses?

Accepted Answer

A)  Only cells lacking receptors can bind hormones.
B)  Only cells in the meristem can respond.
C)  Only cells that express the appropriate receptors can bind hormones.
D)  Only cells that have been previously activated can bind hormones.
E)  None of these choices is correct.F) B) and C)
G) A) and D)

Question 9

In Barrow,Alaska,the sun does not set for several months in the summer.Based on what you know about photoperiodism,what type of plant is most likely to flower during the summer in Barrow?

Accepted Answer

A)  Long-day plants
B)  Short-day plants
C)  Day-neutral plantsD) None of the above
E) All of the above

Question 10

Auxins primarily flow downward in shoots and roots and this transport is called:

Accepted Answer

A)  bipolar
B)  polar
C)  nonpolar
D)  tripolar
E)  dipolarF) C) and E)
G) None of the above

Question 11

Cytokinins are plant hormones that usually affect cell:

Accepted Answer

A)  elongation.
B)  growth.
C)  division.
D)  wall expansion.
E)  turgor pressurE.F) B) and C)
G) C) and D)

Question 12

Select the reaction that is most likely to be a tropism.

Accepted Answer

A)  Flowers blooming when it is warm
B)  Production of aerenchyma
C)  Plants bending away from a heat source
D)  Induction of seed dormancyE) B) and D)
F) B) and C)

Question 13

Brassinosteroids produced by plants are closely related chemically to animal steroid hormones.

Accepted Answer

A) True 
 B)False

Question 14

One reason auxins are called the "master plant hormones" is because they mostly work apart from other hormones.

Accepted Answer

A) True 
 B)False

Question 15

The expression "one bad apple spoils the whole bunch" probably has to do with the action of ethylene on fruit ripening.

Accepted Answer

A) True 
 B)False

Question 16

Which steps compose a plant's triple response to ethylene?

Accepted Answer

A)  Seedlings bend toward the sun,seedling stem thickens,and the seedling stem bends,forming a hook.
B)  Seedling stem stops elongating,seedling stem thickens,and the seedling stem bends,forming a hook.
C)  Seedling stem stops elongating,seedling stem thickens,and the seedling undergoes apoptosis.
D)  Seedling bends away from the sun,seedling stem thickens,and the seedling stem bends,forming a hook.E) A) and C)
F) B) and D)

Question 17

Plant behavior is defined as response to stimuli.

Accepted Answer

A) True 
 B)False  True

Question 18

Which of the following are physical stimuli that influence plant responses?

Accepted Answer

A)  rocks,light,touch,music
B)  water,gravity,temperature,soil minerals,microorganisms
C)  wind,temperature,fungi
D)  CO2,light,water vapor,gravity
E)  touch,gravity,herbivores,pathogensF) All of the above
G) B) and E)

Question 19

The main reason certain seeds germinate near the soil surface rather than deep in the soil is:

Accepted Answer

A)  they need additional oxygen.
B)  they are then more aware of their surroundings.
C)  they require light to germinate.
D)  they have water deprivation.
E)  they are sensitive to the cold temperatures of the soil.F) D) and E)
G) A) and E) C

Question 20

Which one of the following is not a major plant hormone?

Accepted Answer

A)  auxins
B)  brassinosteroids
C)  ethylene
D)  cytokinins
E)  ethanolF) None of the above
G) D) and E)

Exam 28: Flowering Plants: Plant Behavior

Certain trees tend to grow straight and tall with few lateral branches when compared to other trees.In these trees

Correct AnswerverifiedShow Answer

The response to touch by such plants as the sensitive plant is due to:

Correct AnswerverifiedA

Gravitropism is defined as:

Correct AnswerverifiedShow Answer

Which sequence of events is true about phtyochrome?

Correct AnswerverifiedShow Answer

Ethylene has the effect of causing fruits to:

Correct AnswerverifiedShow Answer

Several plants of the same type are grown individually under separate glass covers.One plant is attacked by a herbivore.This plant will be able to use __________ to induce defenses in _________ but not _________.

Correct AnswerverifiedShow Answer

Abscisic acid is an important signal,transported from roots to the stem and leaves during times of water stress,that prevents:

Correct AnswerverifiedShow Answer

Plant hormones bind specific cellular receptor molecules that trigger gene expression responses.Which statement is correct concerning these responses?

Correct AnswerverifiedShow Answer

In Barrow,Alaska,the sun does not set for several months in the summer.Based on what you know about photoperiodism,what type of plant is most likely to flower during the summer in Barrow?

Correct AnswerverifiedShow Answer

Auxins primarily flow downward in shoots and roots and this transport is called:

Correct AnswerverifiedShow Answer

Cytokinins are plant hormones that usually affect cell:

Correct AnswerverifiedShow Answer

Select the reaction that is most likely to be a tropism.

Correct AnswerverifiedShow Answer

Brassinosteroids produced by plants are closely related chemically to animal steroid hormones.

Correct AnswerverifiedShow Answer

One reason auxins are called the "master plant hormones" is because they mostly work apart from other hormones.

Correct AnswerverifiedShow Answer

The expression "one bad apple spoils the whole bunch" probably has to do with the action of ethylene on fruit ripening.

Correct AnswerverifiedShow Answer

Which steps compose a plant's triple response to ethylene?

Correct AnswerverifiedShow Answer

Plant behavior is defined as response to stimuli.

Correct AnswerverifiedTrue

Which of the following are physical stimuli that influence plant responses?

Correct AnswerverifiedShow Answer

The main reason certain seeds germinate near the soil surface rather than deep in the soil is:

Correct AnswerverifiedC

Which one of the following is not a major plant hormone?

Correct AnswerverifiedShow Answer

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A

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Several plants of the same type are grown individually under separate glass covers.One plant is attacked by a herbivore.This plant will be able to use ______ to induce defenses in _ but not _____.

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True

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C

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