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

Microscope Parts

The Cell Thoery 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 membrane- bound 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.