Activities
Concept 18.1 A virus has a genome but can reproduce only within a host cell
Simplified Viral Reproductive Cycle
Phage Lytic Cycle
Phage Lysogenic and Lytic Cycles
Retrovirus (HIV) Reproductive Cycle
Concept 18.2 Viruses, viroids, and prions are formidable pathogens in animals and plants
What Causes Infections in AIDS Patients?
Why Do AIDS Rates Differ Across the U.S.?
Concept 18.3 Rapid reproduction, mutation, and genetic recombination contribute to the genetic diversity of bacteria
Prokaryotic Flagella
What Are the Patterns of Antibiotic Resistance?
Concept 18.4 Individual bacteria respond to environmental change by regulating their gene expression
The lac Operon in E. coli
