Plant growth regulators — cell division: Which plant hormone primarily promotes cell division? Context: Cytokinesis stimulation in meristematic tissues and tissue culture. Choose the correct hormone class.
General Knowledge
Biology
Difficulty: Easy
Choose an option
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ACytokinins (e.g., kinetin, zeatin)
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BAuxins (e.g., IAA)
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CAbscisic acid (ABA)
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DEthylene
Answer
Correct Answer: Cytokinins (e.g., kinetin, zeatin)
Explanation
ConceptCytokinins stimulate cell division (cytokinesis), promote shoot initiation in tissue culture, and delay senescence. Auxins promote cell elongation; ABA is generally growth-inhibitory; ethylene has diverse effects (e.g., fruit ripening).
Final AnswerCytokinins.