BIO 116 Exam 3 2026 Exam
Questions and Answers |
Already Graded A+
Transpired water is replaced as water travels _____ - ANSWER
✔✔up from the roots
Plants receive signals from the environment & respond by ______. -
ANSWER ✔✔altering growth & development
Any response resulting in a curvature of organs toward or away from a
stimulus is called a ______. - ANSWER ✔✔tropism
,Response to light; mediated by the hormone auxin - ANSWER
✔✔Phototropism
Shoots show ______ phototropism, roots show _____. - ANSWER
✔✔positive; negative
Response to gravity; mediated by the hormone auxin as well as in some
plants detection of gravity occurs by the settling of statoliths -
ANSWER ✔✔Gravitropism
Dense cytoplasmic components - ANSWER ✔✔statoliths
Shoots show _____ gravitropism, roots show ________. - ANSWER
✔✔negative; positive
Response to touch (rapid leaf movements in response to mechanical
stimulation/disturbance)
Ex. Mimosa pudica - ANSWER ✔✔Thigmotropism
Transmission of electrical impulses that cause a touch response -
ANSWER ✔✔Action potentials
When electrical potential reaches motor cells at the base of the leaflet,
the folding is caused by a _________ out of motor cells - ANSWER
✔✔rapid efflux of potassium followed by rapid water transport
,effects of light on plant morphology - ANSWER
✔✔photomorphogenesis
2 major classes of light receptors that mediate photomorphogenesis -
ANSWER ✔✔blue-light photoreceptors & phytochrome (for red & far-
red lights)
Morphological adaptations for growing in darkness - ANSWER
✔✔Etiolation
Changes in which shoots and roots then begin to grow normally -
ANSWER ✔✔De-etiolation
4 Phytochrome responses - ANSWER ✔✔De-etiolation, seed
germination, shade avoidance, & control of biological clock
Phytochromes exist in 2 photoreversible states with a conversation of
_____ to ____ triggering many developmental responses - ANSWER
✔✔P(r) to P(fr)
A naturally occurring organic molecule that is synthesized in one part of
the organism and has an effect on another part of the organism -
ANSWER ✔✔Hormone
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, In a plant cell, most hormones can also have significant effects in
_______ where they are synthesized - ANSWER ✔✔the same cells
Plant hormones are ______ that modify or control one or more specific
physiological processes within a plant - ANSWER ✔✔chemical
signals
Plant hormones help coordinate: (3 things) - ANSWER ✔✔growth,
development,& responses to stimuli
Are plant hormones produced in low or high concentrations? -
ANSWER ✔✔Low concentrations
Each hormone has multiple effects, but _______ - ANSWER
✔✔multiple hormones can influence a single process
What do plant responses depend on? - ANSWER ✔✔The amount &
concentration of specific hormones and often the combination of
hormones present
Any chemical that promotes elongation of shoot tip - ANSWER
✔✔Auxin
One of the common naturally occurring auxins in plants - ANSWER
✔✔Indoleacetic acid
Questions and Answers |
Already Graded A+
Transpired water is replaced as water travels _____ - ANSWER
✔✔up from the roots
Plants receive signals from the environment & respond by ______. -
ANSWER ✔✔altering growth & development
Any response resulting in a curvature of organs toward or away from a
stimulus is called a ______. - ANSWER ✔✔tropism
,Response to light; mediated by the hormone auxin - ANSWER
✔✔Phototropism
Shoots show ______ phototropism, roots show _____. - ANSWER
✔✔positive; negative
Response to gravity; mediated by the hormone auxin as well as in some
plants detection of gravity occurs by the settling of statoliths -
ANSWER ✔✔Gravitropism
Dense cytoplasmic components - ANSWER ✔✔statoliths
Shoots show _____ gravitropism, roots show ________. - ANSWER
✔✔negative; positive
Response to touch (rapid leaf movements in response to mechanical
stimulation/disturbance)
Ex. Mimosa pudica - ANSWER ✔✔Thigmotropism
Transmission of electrical impulses that cause a touch response -
ANSWER ✔✔Action potentials
When electrical potential reaches motor cells at the base of the leaflet,
the folding is caused by a _________ out of motor cells - ANSWER
✔✔rapid efflux of potassium followed by rapid water transport
,effects of light on plant morphology - ANSWER
✔✔photomorphogenesis
2 major classes of light receptors that mediate photomorphogenesis -
ANSWER ✔✔blue-light photoreceptors & phytochrome (for red & far-
red lights)
Morphological adaptations for growing in darkness - ANSWER
✔✔Etiolation
Changes in which shoots and roots then begin to grow normally -
ANSWER ✔✔De-etiolation
4 Phytochrome responses - ANSWER ✔✔De-etiolation, seed
germination, shade avoidance, & control of biological clock
Phytochromes exist in 2 photoreversible states with a conversation of
_____ to ____ triggering many developmental responses - ANSWER
✔✔P(r) to P(fr)
A naturally occurring organic molecule that is synthesized in one part of
the organism and has an effect on another part of the organism -
ANSWER ✔✔Hormone
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, In a plant cell, most hormones can also have significant effects in
_______ where they are synthesized - ANSWER ✔✔the same cells
Plant hormones are ______ that modify or control one or more specific
physiological processes within a plant - ANSWER ✔✔chemical
signals
Plant hormones help coordinate: (3 things) - ANSWER ✔✔growth,
development,& responses to stimuli
Are plant hormones produced in low or high concentrations? -
ANSWER ✔✔Low concentrations
Each hormone has multiple effects, but _______ - ANSWER
✔✔multiple hormones can influence a single process
What do plant responses depend on? - ANSWER ✔✔The amount &
concentration of specific hormones and often the combination of
hormones present
Any chemical that promotes elongation of shoot tip - ANSWER
✔✔Auxin
One of the common naturally occurring auxins in plants - ANSWER
✔✔Indoleacetic acid
