19–1 Bacteria The smallest and most common microorganisms are prokaryotes—unicellular organisms that lack a nucleus.
1 Chapter 19- Bacteria. 2 I. Bacteria A. Classifying Prokaryotes 1. Prokaryotes are organisms WITHOUT a nucleus. 2. Prokaryotes can be divided into Eubacteria.
Bacteria and Viruses Chapter 19. Introduction Microscopic life covers nearly every square centimeter of Earth. In a single drop of pond water you would.
