Which of the following statements about plant hormones is incorrect?
Ethylene promotes the seed germination process in plants
Reviewing each option:
A. Auxins (e.g. IAA) cause cell elongation in stems and shoots, leading to phototropism and apical dominance. ✓
B. Cytokinins promote cell division (cytokinesis) and delay senescence (ageing) of leaves. ✓
C. Ethylene is the ripening hormone — it triggers fruit ripening, leaf abscission and senescence. The hormone primarily responsible for breaking dormancy and promoting seed germination is gibberellin, not ethylene. So this statement is incorrect. ✗
D. Abscisic acid (ABA) is the stress hormone — it induces and maintains dormancy in seeds and buds and causes stomatal closure. ✓
Hence the incorrect statement is option C.
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Important Questions from Botany
Which of the following is a type of nutrition?
I. Heterotrophic
II. Autotrophic
Part of N 2cycle that is opposed to N 2fixation is:
Which among the following is the reproductive part of a plant?
Fibres (Adventitious) roots are found in :
In which Part of the flower does Meiosis take place ?
