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Pre-Test
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1
______________ is the gaseous hormone that promotes ripening and coloring of fruits.
A)Cytokinin
B)Ethylene
C)Abscisic acid
D)Gibberellin
2
The shedding of plant parts is termed _______.
A)dormancy
B)abscission
C)senescence
D)photoperiodism
3
Plant hormones function to _______.
A)produce responses only through differential growth and elongation of cells.
B)act as auxins
C)have a generic response to allow multiple cell types to be affected
D)target specific cell types
4
The plant structure, coleoptile refers to a(n)_______.
A)protective sheath that covers roots
B)in dicot plants, the covering for the cotyledon
C)protective sheath that covers the shoots
D)embryonic shoot system
5
Which of the following is a man-made herbicide?
A)cytokins
B)gibberellins
C)auxins
D)All of these





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