AP BIOLOGY

Detailed explanation-1: -The xylem consists of vessels in flowering plants and of tracheids in other vascular plants. Xylem cells are dead hard-walled hollow cells arranged to form files of tubes that function in the transport of water.

Detailed explanation-2: -Vascular plants have tubelike structures that carry water, nutrients, and other sub-stances throughout the plant. Nonvascular plants do not have these tubelike structures and use other ways to move water and substances.

Detailed explanation-3: -Vascular tissue is comprised of the xylem and the phloem, the main transport systems of plants. They typically occur together in vascular bundles in all plant organs, traversing roots, stems, and leaves. Xylem is responsible for the transport of water and dissolved ions from the roots upwards through the plant.

Detailed explanation-4: -The two primary vascular tissues are xylem, which transports water and dissolved minerals from the roots to the leaves, and phloem, which conducts food from the leaves to all parts of the plant.

Detailed explanation-5: -In the vessels the transverse walls between the cells break down and this results in continuous, lignin-lined tubes than run from the root to the growing tip of the shoot.