*Growth and Reproduction *Some bacteria can divide every 20 minutes If there were unlimited resources, 1 bacteria could grow into a mass 4000 times the mass of earth in just 48 hours!!!

Bacteria What is the role of bacteria in our world? List everything you know

Bacteria Are living: Made up of cells Have DNA Grow and develop Use energy Homeostasis Reproduction

B SMART

1) Binary Fission Binary Fission: Asexual reproduction where organism replicates DNA and divides in half Produces two identical daughter cells

Reproduction Binary fission

2) Conjugation Conjugation: (“bacterial sex”) Sexual reproduction where organism exchange genetic information

B SMART Come back!!!!!

Shapes S Cocci Bacilla Spirilla

Shapes S S S S S Streptococus Streptobacilla Streptospirilla Staphlococus Staphlobacilla Staphlospirilla

Some are BAD and make us ill

Streptococcus Strep throat Pnemonia

Tetanus (lock jaw) E. coli Affects nervous system Some in our intestines … others are pathogens that can cause kidney failure

Bacteria intestines decomposers antibiotics Can be bad … but can be good intestines Feel better with?? decomposers antibiotics

Importance of Bacteria

Decomposers Break down things into simpler materials and release into the soil *Help breakdown sewage treatment water

Nitrogen Fixers Converting nitrogen gas into a form plants can use Allows nitrogen to cycle through biosphere

Other Uses E. coli in our intestines Oil digestion Make vitamins that we cannot make Oil digestion

Archaebacteria!

Archaea Lack peptidoglycan walls and have different membrane lipids than Eubacteria DNA sequences are closer to Eukaryotes than Bacteria

Extremophiles Extremophiles: Live in extreme environments!

Halophilic: salt loving

Thermophilic: heat loving