Bacteria

Previously all classifiedKINGDOM MONERA

Bacteria Characteristics Prokaryotic Unicellular Some autotrophic Some heterotrophic Some chemotrophic Contain Cell Walls

Two Kingdoms of Bacteria Archeabacteria

Most primitive organisms on earth Found in very harsh environments

Eubacteria “True Bacteria” Disease causing bacteria in this group

Evolutionary Importance of Bacteria The oldest fossil evidence on earth is

that of Archaebacteria Archaebacteria are believed to be

the ancestors of both Eubacteria and the other eukaryotic kingdoms

The Classification of Bacteria Classification is based on shape and

arrangement of individual cells

Coccus (Cocci) Spherical Shaped bacteria

Bacillus (Bacilli) Rod Shaped Bacteria

Spirillum (Spirilla) Spiral Shaped Bacteria

Bacterial Arrangements “Diplo-”--pair of cells

“Strepto”--Chain of cells

“Staphylo”—Cluster of cells

Draw the following bacterial shapes and arrangements Diplospirillum

Streptobacillus

Staphylococcus

Positive contributions of bacteria Decomposers “Fix” nitrogen into a useable form Food production—yogurt, cheese,

etc. Sewage Treatment Clean Oil Spills Source of antibiotics

Negative affects of Monerans Disease

Syphilis, gonorrhea, tuberculosis, strep throat, botulism, etc.

Food Spoilage