Question

Parenchyma is called a simple tissue but why xylem is called a complex tissue

Answer 1

Answer:

Xylem and phloem are known as complex tissues as they are made up of more than one type of cells. These cells work in a coordinated manner, as a unit, to perform the various functions of the xylem and phloem. ... Sieve tube elements are tube-like elongated structures associated with companion cells.

Answer 2

ANSWER :- Xylem, or wood, as it is often called, is a complex tissue. The cells are thick-walled, tubular and often dead.

Phloem is too a complex tissue made up of four types of cells or elements -- sieve tubes, companion cells, phloem fibres and phloem parenchyma.