Biology Campbell Chapter 39 Test Bank Exam Questions with Correct Answers 100% Verified and Graded A+ 2024
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Biology Campbell Chapter 39 Test Bank Exam Questions with Correct Answers 100% Verified and Graded A+ 2024
B) nonrandom mutations. - Correct Answer All of the following may function in signal transduction in plants except
A.) calcium ions.
B) nonrandom mutations.
C) receptor proteins.
D) phy...
Biology Campbell Chapter 39 Test Bank Exam Questions with Correct
Answers 100% Verified and Graded A+ 2024
B) nonrandom mutations. - Correct Answer All of the following may function in signal
transduction in plants except
A.) calcium ions.
B) nonrandom mutations.
C) receptor proteins.
D) phytochrome.
E) second messengers.
activates defenses throughout the plant before infection spreads. - Correct Answer In
systemic acquired resistance, salicylic acid probably
by producing heat-shock proteins, which may protect the plant ʹs proteins from
denaturing - Correct Answer How may a plant respond to severe heat stress?
the role of statoliths in gravitropism - Correct Answer If a scientist discovers an
Arabidopsis mutant that does not store starch in plastids but has
normal gravitropic bending, what aspect of our understanding would need to be
reevaluated?
If a long-day plant has a critical night length of 9 hours, which 24-hour cycle would
prevent flowering? - Correct Answer If a long-day plant has a critical night length of 9
hours, which 24-hour cycle would
prevent flowering?
red light during the night - Correct Answer The chemical signal for flowering could be
released earlier than normal in a long-day plant
exposed to flashes of
A) production of more signal - Correct Answer Which of the following is not a typical
component of a signal transduction pathway?
A) production of more signal
B) production of second messengers such as cGMP
C) expression of specific proteins
D) activation of protein kinases
E) phosphorylation of transcription factors
acidification of the cell wall, causing denaturation of growth-inhibiting cell wall
proteins. - Correct Answer Auxin enhances cell elongation in all of these ways except
light is perceived by the tips of coleoptiles. - Correct Answer Charles and Francis
Darwin discovered that
, B) cytokininsinitiate programmed cell death - Correct Answer Which hormone is
incorrectly paired with its function?
A) auxinpromotes stem growth through cell elongation
B) cytokininsinitiate programmed cell death
C) gibberellinsstimulate seed germination
D) abscisic acidpromotes seed dormancy
E) ethyleneinhibits cell elongation
abscisic acid. - Correct Answer The hormone that helps plants respond to drought is
TRUE - Correct Answer T/F
Systemic acquired resistance is a generalized plant defense response in organs distant
from
the infection site.
TRUE - Correct Answer T/F
Unlike animal hormones, plant hormones are primarily involved in regulating growth and
development.
TRUE - Correct Answer T/F
Plant hormonal control differs from animal hormonal control in that there are no
separate
hormone producing organs in plants as there are in animals.
TRUE - Correct Answer T/F
The rapid leaf movements resulting from a response to touch (thigmotropism) involve
transmission of electrical impulses called action potentials.
A long-day plant will flower only when the night is longer than a critical value.
TRUE - Correct Answer T/F
A short-day plant exposed to nights longer than the minimum for flowering but
interrupted by short flashes of light will flower.
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