Biology Site
	Deborah Watson-Novacek BellaOnline's Biology Editor

Animal Cells
All living beings are composed of cells, but not all cells are alike. This article discusses the differences between plant and animal cells and the composition of animal cells.

Cell Theory - What is Cell Theory?
First developed in the mid-17th century, cell theory is one of the foundations of the science of biology.

Cell Types - The Three Major Cell Types
We know that cells are the building blocks of all life. In this article, we learn about the three major types of cells and how they differ from one another.

Plant Cells
All living beings are composed of cells, but not all cells are alike. This article discusses the differences between plant and animal cells and the composition of plant cells.