If peach trees growing in specific milclimates of thsouthern UniteStates do not receivabout 850 hours of temperatures below 40 degrees, they will not producflowers in thspring.This is explaineby which of thfollowing terms?
A) photoperiodism
B) phototropism
C) senescence
D) vernalization
E) dormancy
Correct Answer:
Verified
Q76: Studies on thgrowth of coleoptiles involve
A)florigen.
B)ethylene.
C)auxin.
D)abscisic acid.
E)gibberellin.
Q77: In contrast to most other plant hormones,
Q78: Thplant hormonthat inhibits apical dominancis
A)auxin.
B)gibberellin.
C)cytokinin.
D)abscisic acid.
E)ethylene.
Q79: Thplant hormonthat initiates formation of lateral roots
Q80: Thonly plant hormonthat is gaseous is
A)auxin.
B)gibberellin.
C)cytokinin.
D)abscisic acid.
E)ethylene.
Q82: _ refers to thphasfrofull maturity until theventual
Q84: Photochromis thpigment responsiblfor
A)thigmotropism.
B)phototropism.
C)gravitropism
D)photoperiodism.
E)senescence.
Q85: Four of thfivanswers listebelow aruseful to flowers
Q86: Four of thfivanswers listebelow arhaploid.Select thEXCEPTION.
A)gametophyte
B)zygote
C)sperm
D)egg
E)gamete
Q117: Abscission can affect
A) leaves.
B) fruits.
C) flowers.
D) all
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