SSC MTS EXAM

Detailed explanation-1: -tracheid, in botany, primitive element of xylem (fluid-conducting tissues), consisting of a single elongated cell with pointed ends and a secondary, cellulosic wall thickened with lignin (a chemical binding substance) containing numerous pits but having no perforations in the primary cell wall.

Detailed explanation-2: -The xylem consists of tracheary elements, xylem parenchyma cells, and xylem fiber cells. Tracheary elements are dead, hollow cells with patterned cell walls comprising xylem vessels and tracheids, which function as conductive hollow tubes for water and nutrient transport throughout the plant body.

Detailed explanation-3: -The tracheid is the basic cell in the xylem, that is, all plants have tracheids, but not the more highly evolved vessel elements.

Detailed explanation-4: -Xylem is made up of two groups of cells: Tracheids and vessels. Both are non-living cells that help the plant transport water and minerals. Both have thickened cell walls that are heavily lignified. Furthermore, both are elongated tube-like cells.