Significant Evolutionary Steps in the Development of Humans Prokaryotic Cell- simple single celled Eukaryotic Cell- membrane bound nucleus Choanoflagellate-Flagellated Eukaryotes Porifera-(Sea Sponge)-primitive stomach (or coelom) Cnidaria-nervous tissue present (nematocysts) Planarian (Flatworms)- presence of eyespots Pikaia (Lancet)-1 st chordate (dorsal hollow nerve cord) Jawless Fish (Agnatha)- 1 st Vertebrates Placoderm- jawed fishes (development of jaw) Tetrapod- four limbs Amphibian –breath through skin/ability to live on land Reptile –gills have now been replaced by lungs-> or here... Synapsid --> Mammal --> Large cerebral cortex (capable of higher thought), mammary glands, fur 1

Prokaryotic Cell Most primitive form of a cell- 1 st to form Have NO organized nucleus (DNA is not enclosed in a membrane) Can be either autotrophs and photosynthesize or heterotrophs- so come can photosynthesize, while other must consume glucose from an outside source Have both a cell wall and a membrane, Have flagella, cilia or pili for movement Reproduce asexually by fission Ex> E. Coli DOMAIN Bacteria KINGDOM - PHYLUM Proteobacteria CLASS Gammaproteobateria ORDER Enterobacteriales FAMILY Enterobactetericacae GENUS Eschericia SPECIES E.Coli 1 st Cells with No True Nucleus 2 Picture citation D.jpg/250px-EscherichiaColi_NIAID.jpg

Eukaryotic Cell Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Major difference b/w this type of cell and the last Picture of organism described above 3 Picture citation

Choanoflagellate Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 4 Picture citation

Porifera (Sea Sponge) Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 5 Picture citation

Cnidaria Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 6 Picture citation

Planarian (Flat Worm) Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 7 Picture citation

Jawless Fish (Agnatha) Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 8 Picture citation

Placoderm Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 9 Picture citation

Jawless Fish (Agnatha) Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 10 Picture citation

Tetrapod Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 11 Picture citation

Amphibian Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 12 Picture citation

Reptile -- Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 13 Picture citation

Synapsid --> Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 14 Picture citation

Mammal --> or here... Description of the organism on this page, including but not limited to: physical characteristics, eating habits, general development. Prokaryotic Cell DOMAIN KINGDOM PHYLUM CLASS ORDER FAMILY GENUS SPECIES Next major difference b/w previous type of organism Picture of organism described above 15 Picture citation

References Prokaryotic Cell Eukaryotic Cell Choanoflagellate Porifera- Sea Sponge Cnidaria Flatworms 16

References Pikaia Jawless Fish (Agnatha) Placoderm Tetrapod 17

References Amphibian --> Reptile --> or here... Synapsid --> or here... Mammal --> or here... 18

References Pikaia Jawless Fish (Agnatha) Placoderm Tetrapod 19