Hard lignified thick walled long and pointed cells a plant are

Collenchyma is a type of mechanical tissue but it is not as efficient as sclerenchyma. However, it has certain advantages like

Vessels are mainly found in

A simple mechanical tissue devoid of lignin is

Protoxylem is the first formed xylem. If the protoxylem lies next to phloem what kind of arrangement of xylem would you call it?