Which type of tissue is composed of cells with similar structures and functions?

Simple tissues are composed of cells that have similar shapes, sizes, and functions. They are classified as either parenchyma, collenchyma, or sclerenchyma. Parenchyma cells are thin-walled and have a variety of functions, including photosynthesis, storage, and secretion. Collenchyma cells have thicker cell walls and provide structural support to the plant. Sclerenchyma cells have extremely thick and lignified cell walls, which make them strong and rigid, and are involved in providing mechanical support to the plant.

In contrast, complex tissues are made up of different types of cells that perform distinct functions. Examples of complex tissues include xylem, phloem, and epidermis. Xylem and phloem are involved in the transport of water, minerals, and nutrients throughout the plant, while the epidermis provides a protective outer layer.