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BIOL 1020 and BIOL 1021 - Lecture 14- Bacteria and Archaea -
Assigned Readings in Textbook:
Chapter 26 (section 26.4) – The Diversity of Bacteria (pages 540 to 544)
Chapter 26 (section 26.5) – The Diversity of Archaea (pages 545 to 548)
Chapter 26 (section 26.6) – The Evolutionary History of Prokaryotes (pages 548 to 549) – read as homework
Use the following wireframe outline to make notes on the content presented in Lecture 14
Refer to Chapter 26 in your textbook and the Chapter 26 resources on LaunchPad to supplement
your notes and aid in studying this material.
1. How are prokaryotes classified?
(a) Domain Bacteria - Kingdom Bacteria
Bacterial Group Characteristics Example
Gram Negative Bacteria
-Purple sulfur bacteria
-Colour due to unique type pf chlorophyll
-Photoautotrophic or photoheterotrophic
Proteobacteria Free Living Gram negative Proteobacteria
-Chemoheterotrophs
-Intestinal bacteria
-Some cause human diseases
Gram negative photosynthetic bacteria
-Found in hot springs
Green Bacteria -Marine and high salt environments
-Distinctive chlorophyll compared to plants
-Do not release oxygen as by product of photosynthesis
-Gram negative aerobic photosynthetic
prokaryotes
-Responsible for oxygen based life on earth
Cyanobacteria -Most morphologically diverse group of bacteria
-Some species may form colonies
-Some species have specialized cell types
-Primarily chemoheterotrophs
Gram-positive -Many pathogenic species
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Bacteria -Some beneficial species
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