Unit 3: Cells

Chapter 7: Cell Structure & Function

7-4: The Diversity of Cellular Life

Ms. PetrucciBiology

Unicellular Organisms

• A unicellular organism, also known as a single-celled organism, is an organism that consists of only one cell, unlike a multicellular organism that consists of multiple cells.

Multicellular Organisms

• Multicellular organisms are organisms that consist of more than one cell, in contrast to single-celled organisms.

Cell Specialization

http://www.youtube.com/watch?v=moPJkCbKjBs

Cells throughout an organism can develop in different ways to perform different tasks.

All cells carry the same DNA information but they do not perform the same functions and may not look the same.

The process of a cell becoming a particular type of cell is called cell differentiation.

Specialized Animal Cells

• All cells carry the same DNA information but they do not perform the same functions and may not look the same.

• The process of a cell becoming a particular type of cell is called cell differentiation.

Animal Cell Specialization

• Red Blood Cells

• White Blood Cells

• Pancreatic Cells

• Nerve Cells• Muscle Cells• Sperm Cells (gamete)• Ovum Cell (gamete)

Specialized Plant Cells

• Guard cells

Levels of Organization