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Campbell Biology Chapter 27

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Subject: 
Biology
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Tags: 
Biology
microbiology
Prokaryote
bacteria
Archaea
cell
fission
Plasmid
Eukaryote
Chromosome
Heterocyst
Pilus
health

Chapter 27- Bacteria and Archaea Prokaryotes live everywhere and are microscopic Concept 27.1: Structural and functional adaptations contribute to prokaryotic success Earth's first organisms were likely prokaryotes Most unicellular, although some form colonies Between .5-5 micrometers, much smaller than eukaryotic cells(10-100 micrometers) Many shapes Spheres (cocci) Rods (bacilli) Spirals Figure 27.2 Prokaryotic cell has a cell wall, which maintains cell shape, protects the cell, and prevents it from bursting in a hypotonic environment (Eukaryotes have a cell wall made of cellulose or chitin) Capsule- polysaccharide or protein layer that covers prokaryotes

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