1. By Mrs. Gabriel
1.3 Different Cells Perform Various Functions
2. Organisms are classified by their cell type.
Unicellular/archae
Bacteria
Eukarya
Ancient
Prokaryote
Tough cell wall that protects the organism
Bacteria
Unicellular

Cells with a nucleus 3. Multicelluar organisms

Cells in MulticelluarOrganisms Specialize
Specialization: means that specificcells perform specific functions.
Blood cells/tissue cells/muscle cells/nerve cells
Tissue: a group of similar cells that organize to do a specific job.
4. The organism is the highest level of organization.
5. Models are important tools!
James Watson and Francis Crick created the 3-D model of DNA in1953.
Rosalind Franklin used an x-ray to produce the images of DNA.