BSCS Biology: A Molecular Approach

Chapter 11: Plant Growth and Development

Plant Responses

1.
Which type of PGR causes phototropism?
A)a cytokinin
B)a gibberellin
C)an auxin
D)an abscisic acid
2.
Plant ____ are negatively gravitropic.
A)stems
B)roots
C)leaves
D)flowers
3.
In what part of the plant are the plastids that sense the direction of gravity located?
A)in the stems
B)in the leaves
C)in the apical meristems
D)in the root caps
4.
_____ is the plant response to the relative length of light and darkness in a day.
A)photoperiodism
B)phototropism
C)gravitropism
D)inhibition
5.
What is the term that describes the growth of these seedlings toward a light source?

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A)gravitropism
B)autism
C)photoperiodism
D)phototropism
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