October 4-ch 19 - October 4, 2007 Chapter 19 Bacterian and...

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October 4, 2007 Chapter 19 Bacterian and Archaea Bacteria and archaea are fundamentally different Classification of prokaryotes whith each domain is difficult Prokaryotes differ in shape and structure Prokaryotic domains Earth’s first organisms were prokaryotes o Singled celled microbes that lacked organelles Prokaryotes are still abundant o Two of life’s three domains Domain bacteria Domain archeae Similarities between bacteria and archeae o Prokaryotic o Single celled o Small size Differences o Structural and biochemical features Cell walls Plasma membrane Composition Ribosomes Classifying prokaryotes is difficult Prokaryotes are structurally simple No easily observed anatomical or developmental differences Features used o Shape o Means of locomotion o Pigments o Nutrient requirements o Colony appearance o Gram staining characterizes o Nucleotide sequences Different sizes and shapes Three common shapes o Spherical (cocci) o Rodlike (bacilli) o Corkscrew-shape (sphiri)
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This note was uploaded on 04/10/2008 for the course BIOLOGY 101 taught by Professor Beitch during the Spring '07 term at Quinnipiac.

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October 4-ch 19 - October 4, 2007 Chapter 19 Bacterian and...

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