Problem
Why are animals like a centipede, a horseshoe crab, and a barnacle, which all look very different, considered to be in the same group?
Answer should only contain material from the following textbook nowhere else please only this book
Textbook: M. Taylor, E. Simon, J. Dickey and J. Reece (2021). Campbell Biology: Concepts and Connections, 10th Edition. Pearson, Toronto.