Apical dominance is caused by :
Correct answer: D. Auxin in shoot tip
- A. Abscisic acid in lateral bud
- B. Cytokinin in leaf tip
- C. Gibberellin in lateral buds
- D. Auxin in shoot tip
Explanation
d) : According to Thimann and coworkers, auxin is responsible for the dominance of apical bud. The apical dominance is due to interaction between auxin and cytokinin. If the auxin concentration is higher than cytokinin, the apical bud will dominate the growth.
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Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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