AGP 453 FINAL EXAM REVIEW
By Dr. JULIAN PhD
AGP 453 Final Exam Review – Plant Breeding
and Genetics Focused Study Pack with Key
Terms, Diagrams, and Practice Questions |
Agricultural Science Course Exam Prep 2025 |
Iowa State / Similar Programs
,AGP 453 Final Exam Review
Promotes cell division-CORRECT ANSWER ✔✔ Cytokinin
Several disease-causing organisms produce lots of __ causing rapid growth such as galls-
CORRECT ANSWER ✔✔ Cytokinins
Is a gas-CORRECT ANSWER ✔✔ Ethylene
Loss of this hormone may result in altered floral sex determination-CORRECT ANSWER ✔✔
Brassinosteroid
Increases internode length in plants such as rice to escape and survive flooding-CORRECT
ANSWER ✔✔ Gibberllin
Promotes cell elongation in phototropic responses-CORRECT ANSWER ✔✔ Auxin
__ work with __ to regulate apical dominance-CORRECT ANSWER ✔✔ Strigolactones, auxin
4-D herbicide is a synthetic form of this hormone-CORRECT ANSWER ✔✔ Auxin
Function in response to insect herbivores and salt stress-CORRECT ANSWER ✔✔ Jasmonic
Acid
Rapid (millisecond) signal transduction used for responses such as the sensitive plant (Mimosa
pudica) leaf folding-CORRECT ANSWER ✔✔ Electrochemical responses
, What is the example of a non-cell autonomous response-CORRECT ANSWER ✔✔ Formation
of an additional stomata when mature leaves are exposed to high light intensity
In tissue culture, this hormone is given in higher quantity to stimulate shoot development from a
callus-CORRECT ANSWER ✔✔ Cytokinin
What is NOT true about strigolactones-CORRECT ANSWER ✔✔ Stimulates adventitious root
formation
What hormone is a water stress promoting stomatal closure-CORRECT ANSWER ✔✔ Abscisic
acid
Beer brewers may stimulate the breakdown of starch in barley seeds by adding this hormone-
CORRECT ANSWER ✔✔ Gibberellin
__ stimulates axillary bud growth when apical dominance is broken-CORRECT ANSWER ✔✔
Cytokinins
Stunted growth in response to mechanical disturbances-CORRECT ANSWER ✔✔
Thismomorphogenesis
What is vivipory and what causes this in plants-CORRECT ANSWER ✔✔ Precious
germination, when seeds germinate while still on the mother plant. ABA is present in seeds to
promote seed dormancy. When ABA is low or absent, seed dormancy can be broken early,
causing vivipory.
Describe the difference between climacteric and non-climacteric fruits-CORRECT ANSWER
✔✔ Climacteric fruits have an increase in respiration at ripening in response to ethylene.
Non-climacteric fruit do not have that increase in respiration during ripening and do not require
ethylene for ripening.
By Dr. JULIAN PhD
AGP 453 Final Exam Review – Plant Breeding
and Genetics Focused Study Pack with Key
Terms, Diagrams, and Practice Questions |
Agricultural Science Course Exam Prep 2025 |
Iowa State / Similar Programs
,AGP 453 Final Exam Review
Promotes cell division-CORRECT ANSWER ✔✔ Cytokinin
Several disease-causing organisms produce lots of __ causing rapid growth such as galls-
CORRECT ANSWER ✔✔ Cytokinins
Is a gas-CORRECT ANSWER ✔✔ Ethylene
Loss of this hormone may result in altered floral sex determination-CORRECT ANSWER ✔✔
Brassinosteroid
Increases internode length in plants such as rice to escape and survive flooding-CORRECT
ANSWER ✔✔ Gibberllin
Promotes cell elongation in phototropic responses-CORRECT ANSWER ✔✔ Auxin
__ work with __ to regulate apical dominance-CORRECT ANSWER ✔✔ Strigolactones, auxin
4-D herbicide is a synthetic form of this hormone-CORRECT ANSWER ✔✔ Auxin
Function in response to insect herbivores and salt stress-CORRECT ANSWER ✔✔ Jasmonic
Acid
Rapid (millisecond) signal transduction used for responses such as the sensitive plant (Mimosa
pudica) leaf folding-CORRECT ANSWER ✔✔ Electrochemical responses
, What is the example of a non-cell autonomous response-CORRECT ANSWER ✔✔ Formation
of an additional stomata when mature leaves are exposed to high light intensity
In tissue culture, this hormone is given in higher quantity to stimulate shoot development from a
callus-CORRECT ANSWER ✔✔ Cytokinin
What is NOT true about strigolactones-CORRECT ANSWER ✔✔ Stimulates adventitious root
formation
What hormone is a water stress promoting stomatal closure-CORRECT ANSWER ✔✔ Abscisic
acid
Beer brewers may stimulate the breakdown of starch in barley seeds by adding this hormone-
CORRECT ANSWER ✔✔ Gibberellin
__ stimulates axillary bud growth when apical dominance is broken-CORRECT ANSWER ✔✔
Cytokinins
Stunted growth in response to mechanical disturbances-CORRECT ANSWER ✔✔
Thismomorphogenesis
What is vivipory and what causes this in plants-CORRECT ANSWER ✔✔ Precious
germination, when seeds germinate while still on the mother plant. ABA is present in seeds to
promote seed dormancy. When ABA is low or absent, seed dormancy can be broken early,
causing vivipory.
Describe the difference between climacteric and non-climacteric fruits-CORRECT ANSWER
✔✔ Climacteric fruits have an increase in respiration at ripening in response to ethylene.
Non-climacteric fruit do not have that increase in respiration during ripening and do not require
ethylene for ripening.
