Bacteria, Animal, and Plant Cells Cell Theory Bacteria, Animal, and Plant Cells

It is the basic unit of living things. What is a Cell? A cell is the smallest unit that is capable of performing life functions. It is the basic unit of living things.

Discovery of Cells Robert Hooke (mid-1600s) Observed sliver of cork Saw “row of empty boxes” Coined the term cell

Cell Theory All living things are made up of cells. Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.

Characteristics of All Cells A surrounding membrane Protoplasm – cell contents in thick fluid Organelles – structures for cell function Control center with DNA

Examples of Cells Amoeba Proteus Plant Stem Bacteria Red Blood Cell Nerve Cell

Two Types of Cells Prokaryotic Eukaryotic

Prokaryotic Cells First cell type on earth Cell type of Bacteria and Archaea

Prokaryotic Do not have structures surrounded by membranes Few internal structures One-celled organisms, Bacteria

Prokaryotic Cells No membrane bound nucleus Nucleoid = region of DNA concentration Organelles not bound by membranes

Eukaryotic Cells Nucleus bound by membrane Include fungi, protists, plant, and animal cells Possess many organelles Protozoan

Eukaryotic Contain organelles surrounded by membranes Most living organisms Animal Plant

Bacteria are prokaryotes! Animals and plants are eukaryotes! Cell Organization Prokaryotic Cells No membrane around nuclear material Ex.- bacteria and pond scum Eukaryotic Cells Has nucleus with membrane around it Ex.- animal or plant cell Bacteria are prokaryotes! Animals and plants are eukaryotes! Pamela Nell 7th Life Science