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Question
Are perfect flowers really perfect?Answer
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Related questions
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Glandular epithelium
Choose the one most appropriate response for each.
a. ligaments and tendons are made of this
b. contains collagen and elastin; acts as a packing material that supports internal organs
c. receives, conducts, and initiates signals in response to environmental changes
d. stores fat
e. offers resistance to mechanical injury and loss of internal fluids; also a barrier against microorganisms
f. secretes extracellular products such as sweat, mucus, tears, and saliva
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h. extracellular fluid that bathes cells and tissues
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Of the following organs, which is NOT in the abdominal cavity?
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The following questions refer to the figure above of epithelial tissues.
This tissue is found in the gut.
a. A
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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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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
f. low-temperature stimulation of flowering
g. stimulates stomata closure and might be involved in root geotropism
h. stimulates fruit ripening
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p. pigment involved in flowering process
Q:
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
c. has receptor sites for a particular hormonal message
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e. blue-green pigment that absorbs light energy
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m. a nonhormonal plant growth regulator
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b. promotes cell elongation in stems
c. has receptor sites for a particular hormonal message
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Biennial
Choose the one most appropriate answer for each. Some letters may not be used.
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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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The requirement of cold weather before a particular plant process occurs (e.g., germination) is known as
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Plants cannot ____ in the dark.
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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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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
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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?
a. sporopollenin
b. cellulose
c. peptidoglycan
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.