Prokaryotic cells are the earliest cells to evolve and lack membrane-bound organelles. They have genetic material located in the cytoplasm and ribosomes as their only organelle. Bacterial cells have a cell wall, plasma membrane, cytoplasm containing ribosomes and nucleoid, and sometimes a mesosome. Eukaryotic cells evolved later and have a membrane-bound nucleus and organelles. They include membrane-bound structures like the endoplasmic reticulum, Golgi apparatus, mitochondria, lysosomes, and a cytoskeleton. Plant cells also have a cell wall, chloroplasts, and a large central vacuole.

10. Ribosome Http://cellbio.utmb.edu/cellbio/ribosome.htm

12. Endoplasmic Reticulum Http://cellbio.utmb.edu/cellbio/ribosome.htm

15. Lysosome Http://anatomy.med.unsw.edu.au/teach/phph1004/1998/WWWlect3/sld005.htm

17. Golgi Apparatus Http://cellbio.utmb.edu/cellbio/golgi.htm

19. Mitochondrion Http://anatomy.med.unsw.edu.au/teach/phph1004/1998/WWWlect3/sld005.htm

21. Nucleus Http://cellbio.utmb.edu/cellbio/nucleus.htm

29. Chloroplast Www.ultranet.com/~jkimball/BiologyPages/C/Chloroplasts.html

31. Animal Vacuole Www.puc.edu/Faculty/Bryan_Ness/vacuole_TEM.htm

32. Plant Cell Vacuole Www.bio.mtu.edu/campbell/plant.htm

33. Animal Cell vs. Plant Cell Http://:micro.magnet.fsu.edu/cells/html

34. Prokaryotic vs. Eukaryotic Http://micro.magnet.fsu.edu/cells.html