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Question
Which of the following is true regarding insect tracheal systems?a. They are associated with the blood circulatory system.
b. They excrete body wastes as well as transport gases.
c. They depend on the opening and closing of spiracles.
d. The tracheal tubes are continually open in large terrestrial insects.
e. They contain respiratory pigments to enhance oxygen transport.
Answer
This answer is hidden. It contains 1 characters.
Related questions
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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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a. stratified epithelium
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a. stomach
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a. integumentary
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d. urinary
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a. A
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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.
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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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c. has receptor sites for a particular hormonal message
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b. gibberellin.
c. cytokinin.
d. abscisic acid.
e. ethylene.
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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.
Q:
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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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b. abscisic acid.
c. salicylic acid.
d. citric acid.
e. nitric acid.
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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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b. cellulose
c. peptidoglycan
d. exopolysaccharides
e. none of these
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Sperm nuclei are indicated by
a. A.
b. B.
c. C.
d. D.
e. E.
Q:
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a. A.
b. B.
c. C.
d. D.
e. E.