Cells: Prokaryotic vs. Eukaryotic. Cells  Cells – basic unit of living organisms.  Level of organization: < cell < tissue < organ < organ system < organism.

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Presentation transcript:

Cells: Prokaryotic vs. Eukaryotic

Cells  Cells – basic unit of living organisms.  Level of organization: < cell < tissue < organ < organ system < organism

Animal Cells

Red Blood Cells

Nerve Cells

Stomach Cells

Single Cell Paramecium

Plant Cells

Cells  There are MANY types of cells.

Cells  Cells can be divided into two groups based on the presence of organelles.  Organelles – membrane bound structures with specific functions in some cells.

Cells  Prokaryotes – (pro means first) cells that do not contain organelles.  DNA not contained in nucleus.  Seen in unicellular (one cell) like bacteria.

Cells  Eukaryotes - Cells that contain membrane bound organelles.  Seen in multicellular organisms and unicellular organisms like protists, algae and yeast.  Allows chemical reactions to happen in different parts of the cell at the same time.