Question

In pteridophytes and gymnosperms y the xylem tissue consist mainly of
A. Trachea
B. Tracheids
C. Vessel members
D. Sclerenchyma

Answer 1

Hint:- Cells produce in the xylem and look hairs like structure, produce in the root phase and these root phase structures play vital role in the absorption of water from the soil. All the roots are very small in size particles and called hair roots. In water different kinds of salts and minerals are present, water is a diluted solution the cell is filled with liquid known as cytoplasm and on the other hand water is a solution present on the ground.

Complete Answer:-The physical support of the plants that provided by the dissolved minerals from the roots and conveyed plant vascular tissues through the xylem. Treachery elements are the water conducting cells that are found in the xylem tissue and consist of specialized varieties. In the angiosperms and gymnosperms xylem is found only in the vascular tissues including the horsetails, ferns and flowering plants in the tissues that conduct the sugar from the leaves to the rest of the plants. The treachery elements cells typically hollow, elongated or narrow and commonly called the vessels and tracheid’s members. In the gymnosperms and seedless vascular plants mostly found the water conducting cells in the tracheids that are less specialized as compared to the vessel's members. Pit membrane which serves to prevent the passage of air bubbles in the modified primary cells with the help of water moving from the tracheid to tracheid. Perforations known as the primary and secondary cell walls that characterize the lack of species into the tracheid through the vessels members’ principle of the angiosperms by the water conducting cells. Through the perforations water flows through the unimpeded from vessel to vessel and disruption of the air bubbles more likely from the condition.
.
Therefore the correct option is (B)

Note:- There are two kinds of forces present in it: cohesive forces and adhesive forces help in formation in the xylem column. Cohesive forces means the same kind of interaction in the water molecules and water molecules attached very tightly with each other. On the other hand adhesive forces means different kinds of interactions present in it these are present in the water molecules and the xylem vessels.