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Question
A mutant plant is found in which the seeds germinate far too early. Which hormone is likely involved and why?Answer
This answer is hidden. It contains 245 characters.
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__________ is a response to changes in length of night relative to length of day.
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Respond to the following statements in reference to the five plant hormones listed below.
a. auxins
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d. abscisic acid
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This hormone promotes bud and seed dormancy.
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Circadian
Choose the one most appropriate answer for each. Some letters may not be used.
a. flower each successive year or after several years of vegetative growth
b. promotes cell elongation in stems
c. has receptor sites for a particular hormonal message
d. a hollow, cylindrical organ that protects young leaves growing within it
e. blue-green pigment that absorbs light energy
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Gibberellin
Choose the one most appropriate answer for each. Some letters may not be used.
a. flower each successive year or after several years of vegetative growth
b. promotes cell elongation in stems
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d. a hollow, cylindrical organ that protects young leaves growing within it
e. blue-green pigment that absorbs light energy
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h. stimulates fruit ripening
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m. a nonhormonal plant growth regulator
n. lives for only one growing season
o. promotes stem elongation in plants
p. pigment involved in flowering process
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b. promotes cell elongation in stems
c. has receptor sites for a particular hormonal message
d. a hollow, cylindrical organ that protects young leaves growing within it
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f. low-temperature stimulation of flowering
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Biennial
Choose the one most appropriate answer for each. Some letters may not be used.
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b. promotes cell elongation in stems
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p. pigment involved in flowering process
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Which plant hormone listed below is responsible for the symbiotic relationship shown in the above figure?
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b. vernalization.
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Plants cannot ____ in the dark.
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c. cytokinin.
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The gaseous plant hormone is
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b. gibberellin.
c. cytokinin.
d. abscisic acid.
e. ethylene.
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The polar transport of auxin in a plant
a. creates an uneven distribution of the hormone.
b. uses active membrane transporters to move auxin in and out of cells.
c. uses membrane pumps to move hydrogen ions out of the cytoplasm into the primary cell wall.
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e. does all of these.
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Auxin concentration gradients
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b. promote the transcription of an enzyme that breaks down cytokinin.
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d. help young cells elongate so that shoots and roots lengthen.
e. are described by all of these EXCEPT "appear once germination begins."
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Root formation in stem cuttings can be improved by the application of
a. synthetic auxins.
b. abscisic acid.
c. salicylic acid.
d. citric acid.
e. nitric acid.
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Perhaps a plant's greatest liability is its inability to
a. produce growth hormones.
b. use aerobic respiration.
c. move when conditions around it deteriorate.
d. produce its own lipids and proteins.
e. respond to dwindling supplies of nutrients and water.
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A pollen grain coat is composed of which of the following?
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b. cellulose
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d. exopolysaccharides
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Sperm nuclei are indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
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Meiosis is indicated by
a. A.
b. B.
c. C.
d. D.
e. E.