Which of the following statements about tissues is true?

The statement that tissues can be made up of different types of cells is accurate and highlights a fundamental aspect of tissue organization in the body. Tissues are groups of cells that work together to perform a specific function, and they can indeed comprise various cell types that contribute to the tissue's overall role. For instance, connective tissue can include different cells like fibroblasts, adipocytes, and macrophages, each playing a unique part in supporting and maintaining the tissue's structure and function.

The other statements do not accurately reflect the characteristics of tissues. While some tissues may function somewhat independently, they usually work in concert with other tissue types within organs and systems. Additionally, tissues are present not only in developed organisms but also in simpler organisms, indicating that tissues are a basic structural element in both complex and simple life forms. Lastly, while a specific tissue type may consist predominantly of one kind of cell, such as muscle tissue primarily made up of muscle cells, it is not accurate to say that all tissues are composed of identical cells, as the diversity of function often necessitates a mix of cell types.