Which xylem element have highly thickned walls and obliterated central lumen?

Which xylem element have highly thickened walls and obliterated central lumen?

Which elements are highly stable?

Assertion :- Xylem fibres have highly thickened walls and continous central lumen. Reason :- Xylem fibre's wall show lignin deposition and there is no septation and deposition in their lumen face.

Match column I with column II and select the correct option from the given codes. {:("Column I","Column II"),(A." Vessels",(i)." Cells are living, with thin cellulosic cells walls"),(B." Tracheids",(ii)." Cells possess highly thickened walls with obliterated central lumen"),(C." Xylem fibres",(iii)." Individual members are interconnected through perforations in their common walls"),(D." Xylem parenchyma",(iv)." Elongated tube-like cells with thick, lignified walls and tapering ends"):}

Match column I with column II and select the correct option from the given codes. {:("Column I","Column II"),(A." Vessels",(i)." CElls are living, with thin cellulosic cells walls"),(B." Tracheids",(ii)." Cells possess highly thickened walls with obliterated central lumen"),(C." Xylem fibres",(iii)." Individual members are interconnected through perforations in their"),(D." Xylem parenchyma",(iv)." Elongated tube-like cells with thick, lignified walls and tapering ends"):}

The central lumens are obliterated in

The central lumens are obliterated in

Which of the following have thickest wall :-

Which blood vessels have thick and elastic walls?