Puberty-related changes in appearance are influenced by the secretion of testosterone in males and oestrogen in females.

Growth hormone, secreted by the pituitary, regulates the growth and development of the body. A deficiency of this hormone in childhood leads to dwarfism, affecting the overall growth and stature of an individual.

Iodised salt is crucial as iodine is necessary for the synthesis of thyroxin hormone in the thyroid gland. Thyroxin regulates carbohydrate, protein, and fat metabolism, ensuring a balanced environment for growth.

Animal growth is carefully controlled in specific places, ensuring body design maintenance. Unlike plants that can grow leaves in various locations, animals exhibit controlled growth, such as not growing fingers on the face, maintaining a specific body design even during ...

Geotropism refers to the growth response of plant roots downward (positive geotropism) and shoots upward (negative geotropism) in alignment with the pull of gravity.