NEET BIOLOGY

Detailed explanation-1: -These hormones responsible for control and coordination are called phytohormones. Phytohormones are of four types: Auxin: Released on the tip of the roots and stems. Its function is to make cell growth and cell differentiation.

Detailed explanation-2: -Auxins hormone controls a plant response to light and gravity. It is made by the cells present at the tip of a stem and roots. This hormone moves the plant away from light and towards gravity. It speeds up the growth of stem and slows down the growth of roots.

Detailed explanation-3: -Auxins are a family of plant hormones. They are mostly made in the tips of the growing stems and roots, which are known as apical meristems, and can diffuse to other parts of the stems or roots. Auxins control the growth of plants by promoting cell division and causing elongation in plant cells (the cells get longer).

Detailed explanation-4: -Important plant hormones include: auxins which control the rate of cell elongation. gibberellins also control cell elongation but also influence germination, flowering and dropping fruit and leaves. ethene, also known as ethylene, which controls fruit ripening.

Detailed explanation-5: -Auxins – They help in the cell growth at the shoot tips. By elongating the cells, they help in the growth process. Gibberellins – These hormones are responsible for the cell growth in the stem, seed germination, and flowering. Cytokinins – They promote cell division in plants.