Warmup What is the difference between eukaryotic and

Warm-up • What is the difference between eukaryotic and prokaryotic cells? • Which type of cells do humans have? • So which type of cell is more complex?

Chapter 7. 1 Microscope & Cell

Microscope A microscope is an instrument used to make small objects look larger.

Three Types of Microscopes Simple Microscope: only has one lens.

Compound Light Microscope: uses series of light and lenses to magnify objects

Electron Microscope: Uses a magnetic field to bend the beam of an electron

Microscope A C B E D F H I G J K M N L

Microscope Parts

The Cell Theory • • Robert Hooke – studied cork cells Schleiden – plant cell Schwann – animal cell Cells – basic building blocks of all living things – 1. All organisms composed of 1 or more cells – 2. Cells are the basic unit of organization of organisms – 3. All cells come from preexisting cells

Prokaryote Cells • Unicellular organisms that lack membranebound organelles – Example: Bacteria & Archaea

Eukaryote Cells • Contain a nucleus and membrane-bound organelles – Examples: Animals, Plants, Fungi Organelles – membrane bound structures with in eukaryotic cells, each organelle has a specific function for cell survival

Similarities vs. Differences • cell membranes • ribosomes • Both have genetic material/DNA • cytoplasm • Eukaryotic cells have a nucleus, which contains the genetic material. • The DNA in prokaryotic cells floats freely in the cell. • Eukaryote cells have membrane bound organelles. • Eukaryotic Cells are on average ten times larger than Prokaryotic cells.