LIFE SCIENCE

Detailed explanation-1: -In flowering plants, the Xylem is composed of four different elements namely tracheids, xylem vessels, xylem fibers, and xylem parenchyma. In gymnosperms xylem vessels are not present, therefore Xylem tracheids are the main conducting tissue in these plants.

Detailed explanation-2: -Tracheids are considered the chief water-conducting elements in gymnosperms and pteridophytes.

Detailed explanation-3: -Xylem is composed of 4 elements: tracheids, vessels, xylem parenchyma and xylem fibres. Vessels are not present in gymnosperms.

Detailed explanation-4: -The xylem tracheary elements consist of cells known as tracheids and vessel members, both of which are typically narrow, hollow, and elongated. Tracheids are less specialized than the vessel members and are the only type of water-conducting cells in most gymnosperms and seedless vascular plants.