Bacteria Kingdom

Bacteria were not discovered until the microscope was invented They are too small to see with the naked eye! Discovery

The Bacterial Cell Prokaryotes: No nucleus or organelles They still use energy, grow, respond, and reproduce! The Bacterial Cell

Bacteria Structures Most have a cell wall Flagellum: whip or tail-like structure used for movement Bacteria Structures

Many Shapes

Asexual : cell divides in two to form two new cells by binary fission Reproduce about once every 20 minutes Some can sexually reproduce Reproduction

Autotrophs Heterotrophs Getting Food

Two Bacteria Kingdoms Live in extreme environments Produce bad odors Archaebacteria Eubacteria Live in extreme environments Produce bad odors Live on and in your body Beneficial to environment Two Bacteria Kingdoms

Uses for bacteria Food production: Fuel: Archaebacteria produce methane gas Food production: Bacteria growing in milk produce sour cream & yogurt Recycling: Bacteria in the soil break down chemicals and return them to the environment Clean-up Bacteria can be used to clean-up oil spills Uses for bacteria

Illness & Health Infectious Diseases: diseases that can be spread between people Strep Throat, food poisoning, Tuberculosis Prevention: wash hands/sanitizer

Bacteria Review Video

Viruses Non-living particles

A Virus is a small particle that invades living things to reproduce Non-living Don’t reproduce on own Don’t use energy Don’t respond to environment What is a Virus?

Structure Viruses are smaller than bacteria Two parts: Outer protein coat Inner core with genetic material Structure

To reproduce viruses must invade another organism: called a host They act like parasites because the destroy the cells of the organism they invade Reproduction

Virus Reproduction

Illness & Health Viral Diseases: Cold, flu, AIDS, H1N1 etc. There is no medication for viral disease Vaccines can help prevent viral infection by building your bodies defenses Illness & Health