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.

Plants seem to move in response to stimuli because of directional or tropic growth. Environmental triggers like light or gravity influence the direction in which plant parts grow, creating the illusion of movement.

Tropic movements in plants are directional responses to environmental triggers such as light or gravity. Shoots exhibit positive phototropism by bending towards light, while roots show negative phototropism by bending away from light.