BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Auxin is a key regulator of plant growth and development, orchestrating cell division, elongation and differentiation, embryonic development, root and stem tropisms, apical dominance, and transition to flowering.

Detailed explanation-2: -Auxin promotes cell elongation, especially of shoots, and induces apical dominance and rooting, while gibberellin helps in cell growth of stem, leaves and other aerial parts by causing cell elongation, and increase in internodal length.

Detailed explanation-3: -Auxins control the growth of plants by promoting cell division and causing elongation in plant cells (the cells get longer). Stems and roots respond differently to high concentrations of auxins: cells in stems grow more. cells in roots grow less.

Detailed explanation-4: -Auxin and cytokinin are critical growth hormones in plant development and are naturally present within the plant at variable concentrations throughout the season.