Why are xylem and phloem called complex tissues?

Why are xylem and pholem called complex tissues?

Why are xylem and phleom called complex tissue?

Why xylem and phloem are called complex tissues?

Why xylem and phloem are called as complex tissue

Why are xylem and phloem called complex permanent tissue ? What are their chief constituents ? Also, mention their role.

Phloem is a complex tissue.

Assertion : Xylem and phloem are complex tissues. Reason : Complex tissue is collection of different types of cells.

Xylem and phloem are examples of ___ tissue.