Discovered cells while looking at cork.
Anton Van Levwenhoke
Discovered single-celled organisms. & thought that cells were found in animals as well as plants.
Stated all plants contained cells.
Stated all animals contained cells.
Concluded that cells must arise form pre-existing cells.
1. All organisms are composed of one or more cells.
2. The cell is the basic unit of life in all things.
3. All cells are produced by the division of pre-existing cells.
Have a nucleus.
How to calculate total magnification on a microscope.
Eyepiece 10x times Scanning 4x = 40x
Eyepiece 10x times Low 10x = 100x
Eyepiece 10x times High 40x = 400x
Focuses beams of electrons on specimens. Can form images of objects 1000x smaller than those visible under light microscope.
Scanning Electron Microscope
Produces 3d images of the surfaces of organisms.
Transmission Electron Microscope
Beam of electrons shine through a specimen.
Boundary between cells & external environment. Semi permeable.
Found outside the cell membrane in plant, fungi, & bacterial cells. Gives support and is made of cellulose.
Controls most cell processes w. DNA.
Long strands of DNA.
Surrounds nucleus, double layer, has pores.
Network of protein fibers that help cells keep shape.
Thin hollow cylinders that help keeps shape & separate chromosomes during cell division.
Short hairlike projections
Long whip-like projection.
Temporary foot-like projections.
Site of protein synthesis.
Assemble and transport of proteins.
PACKAGES AND EXPORTS ALL CELL PRODUCTS.
Stores water, salts, proteins, & carbs.
Contains enzymes for digestion food and old cell parts.
Converts glucose to ATP.
Uses sunlight to make energy-rich food.