NEET BIOLOGY

Detailed explanation-1: -Stimulating shoot elongation – Auxins positively influence gibberlins that promote cell elongation. This increases plant length. Essentially, gibberlins and thereby auxins, increase the distance between nodes, spacing the branch points further apart.

Detailed explanation-2: -Auxins are organic substances, which promote the growth and development of plants at low concentrations. Auxins regulate numerous developmental processes in plants including cell expansion, root initiation, vascular tissue differentiation, bud and flower growth (Davies, 2013).

Detailed explanation-3: -Answer: Auxin promotes cell growth and elongation of the plant. In the elongation process, auxin alters the plant wall plasticity making it easier for the plant to grow upwards. Auxin also influences rooting formations.

Detailed explanation-4: -The plant hormone auxin is well known to stimulate cell elongation via increasing wall extensibility. Auxin participates in the regulation of cell wall properties by inducing wall loosening.

Detailed explanation-5: -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.