Biology (Mader), 10th Edition

Chapter 26: Flowering Plants: Control of Growth Responses

Post-Test

1
______________ is the gaseous hormone that promotes ripening and coloring of fruits.
A)Cytokinin
B)Ethylene
C)Abscisic acid
D)Gibberellin
2
The shedding of plant parts is termed _______.
A)dormancy
B)abscission
C)senescence
D)photoperiodism
3
Plant hormones function to _______.
A)produce responses only through differential growth and elongation of cells
B)act as auxins
C)have a generic response to allow multiple cell types to be affected
D)target specific cell types
4
The plant structure, coleoptile refers to a(n) _______.
A)protective sheath that covers roots
B)in dicot plants, the covering for the cotyledon
C)a protective sheath that covers the shoots
D)an embryonic shoot system
5
Which of the following is a man-made herbicide?
A)cytokins
B)gibberellins
C)auxins
D)All of these
6
Agent Orange, a defoliant used in Vietnam, is synthesized from ________.
A)abscisic acid
B)dioxin
C)2,4-D
D)2,4,5-T
7
__________ light initiates the greatest phototropic response in plants.
A)Yellow.
B)White
C)Blue
D)Red
8
Which of these statements is false?
A)Ethylene gas promotes abscission.
B)Plants adjust their patterns of growth in response to environmental rhythms.
C)The total of biological processes in plants leading to death is known as senescence.
D)Plants do not have biological clocks.
9
Long day plants are characterized by _______.
A)inclusion of plants such as chrysanthemums and poinsettias
B)they will not bloom if the dark period is interrupted by light
C)they respond to short, dark periods, not long, light periods
D)All of these
10
Long day plants are characterized by _______.
A)inclusion of plants such as chrysanthemums and poinsettias
B)they will not bloom if the dark period is interrupted by light
C)they respond to short, dark periods, not long, light periods
D)All of these
11
Which of these statements is NOT true?
A)An immature orange tree taken from Florida and planted in Iowa might begin to grow too soon and be killed by a late frost.
B)A single stem exposed to an appropriate environment will go ahead and break dormancy, even though the rest of the plant remains dormant.
C)Plants grow toward the light because they need light.
D)Plants will grow in the dark for a limited time.
12
Long day plants ________.
A)will not flower if their dark period is interrupted by light
B)will not grow in the tropics
C)will not reproduce in the tropics
D)flower early in the spring or late fall
13
_________ is the plant growth response which promotes tendrils to wrap around supports.
A)Thigmotropism
B)Phototropism
C)Gravitropism
D)All of these
14
In plants, the hormone cytokinin functions to ______.
A)enhance fruit ripening and leaf abscission
B)promote cell division and reduce leaf aging
C)control bud and seed dormancy
D)control gravitropism and phototropism
15
Phytochrome far red controls ______.
A)thigmotropism
B)phototropism
C)gravitropism
D)All of these
16
Foolish rice plants are developed from the action of the ___________ hormone.
A)abscisic acid
B)ethylene
C)gibberellin
D)auxin
17
All of these are physical attacks against plants EXCEPT ______.
A)fungal attack through the stomata
B)nematodes breaking through the epidermis of a root and establishing a parasitic relationship
C)aphids' specially designed mouthparts attacking the phloem of the plant
D)All of these are physical attacks.
18
After a leaf is injured, the plant produces __________, which destroys the digestive enzymes of the predator feeding on them.
A)cyanogenic glycosides
B)steroid glycosides
C)proteinase inhibitors
D)None of these are correct.
19
The production of anti-herbivore chemicals by defense genes in plants such as tobacco and lettuce is initiated by:
A)salicylic acid.
B)taxol.
C)alkaloids.
D)none of these initiate the production of the anti-herbivore chemicals by defense genes in plants.
20
In the mutualistic relationship between the Pseudomyrinex ferruginea acacia and ants, the ants provided which of the following actions in return for being provided a home and food materials:
A)Allowing would-be herbivores to sample parts of the plant to initiate pollination
B)Attacking any would-be herbivores to protect the plant structure
C)Pollinating the plant
D)None of these
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