NEET BIOLOGY

Detailed explanation-1: -Auxins function primarily in stem elongation by promoting cell growth. Indole-3-acetic acid (IAA) is the major naturally occurring auxin and one of the major growth factors in plants. They were the first group of plant growth hormones discovered. Auxins serve dual roles in plants depending on where they are produced.

Detailed explanation-2: -Gibberellins promote the formation of flowers on genetically plants in Cannabis whereas ethylene promotes formation of flowers on genetically plants.

Detailed explanation-3: -Gibberellins are plant growth regulators that facilitate cell elongation, help the plants to grow taller. They also play major roles in germination, elongation of the stem, fruit ripening and flowering.

Detailed explanation-4: -They stimulate cell elongation, breaking and budding, seedless fruits, and seed germination. Gibberellins cause seed germination by breaking the seed’s dormancy and acting as a chemical messenger.

Detailed explanation-5: -Gibberellins are a group of plant hormones responsible for growth and development. They are important for initiating seed germination . Low concentrations can be used to increase the speed of germination, and they stimulate cell elongation so plants grow taller. They are naturally produced by barley and other seeds.