alleryStart learning →The plant hormone responsible for cell elongation and growth is
Aabscisic acid
Bauxin
Cinsulin
Dadrenaline
Answer & Solution
Correct answer: B. auxin
1. Plant growth is directed by plant hormones (phytohormones).
2. **Auxin** promotes cell elongation; it accumulates on the shaded side, bending the shoot towards light.
3. Abscisic acid, by contrast, inhibits growth. Insulin and adrenaline are animal hormones.
_Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch7 'Control and Coordination', §7.3_
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