Ag Crop Physiology Final (2025/2026) ACTUAL EXAM COMPREHENSIVE
QUESTIONS AND VERIFIED ACCURATE SOLUTION (DETAILED & ELABORA
ED) |GET IT 100% ACCURATE!! 2025 TEST!!
a plant hormone is an organic compound
that is synthesized in one part of the
plant and translocation to another part, Define a plant hormone
and in low concentrations it will cause a
physiological response
- terpenes
List the three primary groups of sec-
- phenolics
ondary metabolites and describe their
- nitrogen
chemical difference
- containing compounds
they used ABC model, using petals, What type of experiment did scientists
sepals, stamen and carpel. they used conduct using Arabidopsis to help iden-
mutations and measured the plants us- tify 'floral identity genes' in flowering
ing this model plants
If the soil is at field capacity (Yp=0) and
-0.5 the roots hairs have a Yw=-0.3 and a
Yp=0.2, what is the Ys?
If salt water intrusion should occur and
the soil is still at field capacity and the
lower Ys of the soil=-3.0, the Yw of the root
hairs becomes -1.1. This is caused by a
______ pressure potential
This was a direct effect of water moving
out of
______ the root hair cells
The process by which this water move-
diffusion ment and change in water potential oc-
cured is called ____?
This plant growth regulator is a relatively
Brassinosteroids
new hormone called ____?
Their effect on plant growth is similar to
Auxins
_____?
However they may stimulate _____ pro-
Ethylene
duction causing lateral root formation.
stress
1/9
, Ag Crop Physiology Final (2025/2026) ACTUAL EXAM COMPREHENSIVE
QUESTIONS AND VERIFIED ACCURATE SOLUTION (DETAILED & ELABORA
ED) |GET IT 100% ACCURATE!! 2025 TEST!!
Although this growth hormone has been
found to increase the yield of many
crops, the response depended on the
____ under which the crop was grown.
Abscisic acid is translocated in the vas-
phloem
cular cambium, primarily in the ____.
During water stress the pH of xylem sap
increases
___ favoring dissociated ABA
This result in redistribution of ABA in the
leaf and thus increases ABA reaching
effux
the guard cells stimulating closing of the
guard cells by potassium
ABA inhibits ethylene production promot-
low ing root growth when the water potential
is ____.
_____ is the free major site of free cy-
root apical meristem
tokinin synthesis.
Cytokinins move through the xylem into
shoot
the _____.
Cytokinin induce cell division in callus
Auxin
cells in the presence of ___.
Cytokinins promote ____ formation lead-
callus
ing to organogenesis in tissue culture.
The rate limiting step for ethylene pro-
ACC synthase duction is ____ induced by wounding of
the plant
____ inhibits ethylene synthesis by
carbon dioxide blocking ACC oxidase and used to pre-
vent ripening of fruits in storage.
These types of fruit produce ethylene
climacteric and can be stimulated to ripen by ethyl-
ene.
2/9
QUESTIONS AND VERIFIED ACCURATE SOLUTION (DETAILED & ELABORA
ED) |GET IT 100% ACCURATE!! 2025 TEST!!
a plant hormone is an organic compound
that is synthesized in one part of the
plant and translocation to another part, Define a plant hormone
and in low concentrations it will cause a
physiological response
- terpenes
List the three primary groups of sec-
- phenolics
ondary metabolites and describe their
- nitrogen
chemical difference
- containing compounds
they used ABC model, using petals, What type of experiment did scientists
sepals, stamen and carpel. they used conduct using Arabidopsis to help iden-
mutations and measured the plants us- tify 'floral identity genes' in flowering
ing this model plants
If the soil is at field capacity (Yp=0) and
-0.5 the roots hairs have a Yw=-0.3 and a
Yp=0.2, what is the Ys?
If salt water intrusion should occur and
the soil is still at field capacity and the
lower Ys of the soil=-3.0, the Yw of the root
hairs becomes -1.1. This is caused by a
______ pressure potential
This was a direct effect of water moving
out of
______ the root hair cells
The process by which this water move-
diffusion ment and change in water potential oc-
cured is called ____?
This plant growth regulator is a relatively
Brassinosteroids
new hormone called ____?
Their effect on plant growth is similar to
Auxins
_____?
However they may stimulate _____ pro-
Ethylene
duction causing lateral root formation.
stress
1/9
, Ag Crop Physiology Final (2025/2026) ACTUAL EXAM COMPREHENSIVE
QUESTIONS AND VERIFIED ACCURATE SOLUTION (DETAILED & ELABORA
ED) |GET IT 100% ACCURATE!! 2025 TEST!!
Although this growth hormone has been
found to increase the yield of many
crops, the response depended on the
____ under which the crop was grown.
Abscisic acid is translocated in the vas-
phloem
cular cambium, primarily in the ____.
During water stress the pH of xylem sap
increases
___ favoring dissociated ABA
This result in redistribution of ABA in the
leaf and thus increases ABA reaching
effux
the guard cells stimulating closing of the
guard cells by potassium
ABA inhibits ethylene production promot-
low ing root growth when the water potential
is ____.
_____ is the free major site of free cy-
root apical meristem
tokinin synthesis.
Cytokinins move through the xylem into
shoot
the _____.
Cytokinin induce cell division in callus
Auxin
cells in the presence of ___.
Cytokinins promote ____ formation lead-
callus
ing to organogenesis in tissue culture.
The rate limiting step for ethylene pro-
ACC synthase duction is ____ induced by wounding of
the plant
____ inhibits ethylene synthesis by
carbon dioxide blocking ACC oxidase and used to pre-
vent ripening of fruits in storage.
These types of fruit produce ethylene
climacteric and can be stimulated to ripen by ethyl-
ene.
2/9
