Question

Why are vascular tissues called complex permanent tissues?

• A. They are made up of only one kind of cells.
• B. They are made up of more than one kind of cells.
• C. They have a very complex cellular structure.
• D. They have a complex cellular function.

Answer 1

The correct option is B

They are made up of more than one kind of cells.

Simple permanent tissues are made up of only one type of cells. Examples are parenchyma, collenchyma, and sclerenchyma tissues. Complex permanent tissues are made up of more than one type of cells. Examples are the vascular tissues - xylem and phloem. Xylem is made of xylem parenchyma (for food storage), trachieds/trachea(for water conduction), vessels(for better water conduction) and xylem fibres(sclerenchyma tissue) (for mechanical support). Similarly phloem is made of phloem parenchyma(for food storage), seive tubes (for translocation of food), companion cells(support seive tubes in translocation of food) and phloem fibers(sclerenchyma)(for mechanical support).