Biology CLEP Prep Practice Exam 2026 - Free Biology CLEP Practice Questions and Study Guide

The cell wall is a rigid structure that provides protection and support for the cells. It is only found in plant cells because they are the only type of cells that need this additional layer for structure and support. Bacterial cells have a different cell wall structure that is not made of cellulose like in plant cells. Fungal cells do have a cell wall, but it is made of a different material called chitin. Animal cells, on the other hand, do not have a cell wall at all, but instead have a flexible cell membrane. This is why the most accurate answer is A, plant cells.