STD 11 - 13. Plant growth and development — BIOLOGY STD 11 Science — Question
Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 13. Plant growth and development1 Mark
MCQ
Rapid and dramatic increase in shoot length is called
A
Triple response growth
✓
Bolting
C
scarification
D
Night break effect
✓
Answer
Correct option: B.
Bolting
b Rapid and dramatic increase in shoot length is called bolting. Gibberellins induce stem elongation in 'rosette plants'. E.g., cabbage, henane, etc, such plants show retarded internodal growth and profuse leaf development. In these plants, just prior to the reproductive phase, the internodes elongate enormously causing a marked increase in stem height, i.e., bolting.
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