HORTICULTURE

Detailed explanation-1: -Vascular plants evolved stems made of vascular tissues and lignin. Because of lignin, stems are stiff, so plants can grow high above the ground where they can get more light and air.

Detailed explanation-2: -The vascular adaptation hypothesis proposes that the environment controls the plant’s vascular system through its control of plant’s development, height, and shape. Limiting conditions suppress plant growth and shorten the active growth period, which restrict plant development resulting in small plants.

Detailed explanation-3: -Vascular plants (tracheophytes): Vascular tissue provides support that holds plants erect and allows them to grow much taller, also allowing transport of materials from one part to another. Leaves are the principal organs of photosynthesis in most plants.