Slide 1Chapter 20 Viruses and Bacteria Section 1: Viruses Section 2: Bacteria Slide 2 Section 1 Viruses Objectives: Describe why a virus is not considered a living organism.…

Slide 11 -Classification: Internal 2010-05-25 Uncertainty in petroleum reservoirs Slide 2 2 -Classification: Internal 2010-05-25 Finding the reservoir I Slide 3 3 -Classification:…

1. ENDODONTIC BIOFILM 2.  Biofilm is defined as a sessile multi cellular microbial community characterized by cells that are firmly attached to a surface and embedded…

Slide 1 Cell Membranes BIO 224 Introduction to Molecular and Cell Biology Slide 2 Cell membranes Cell membranes separate the interior of cells from the external environment…

Prokaryotes Chapter 28 The First Cells Microfossils are fossilized forms of microscopic life -Oldest are 3.5 billion years old The First Cells Stromatolites are mats of cyanobacterial…

CHAPTER 4 CELLS CELLS Cells are the smallest unit of life. Because they are so small, no one observed them until the microscope was invented. Robert Hooke was the first to…