7-4 Diversity of Cellular Life Page 190

A. Unicellular Organisms 1. Organisms that are made up of only 1 cell. – Examples: Yeast, Amoeba, Volvox Aureus (Green Algae

B. Multicellular Organisms 1. Organisms made up of many cells.

B. Multicellular Organisms 2. All the cells need to have a way of communicating with each other.

B. Multicellular Organisms 3. Cell specialization allows cells to develop in different ways to perform different tasks.

C. Levels of Organization 1. Cells  Tissues  Organs  Organ Systems

C. Levels of Organization 2. Tissues are groups of similar cells that perform a specific function.

C. Levels of Organization 3. Many different tissues work together to become organs.

C. Levels of Organization 4. A group of organs working together is an organ system.