The Bacterial CellThe Bacterial CellBacteria are Bacteria are prokaryoticprokaryotic

(lack a nucleus)(lack a nucleus)

Shape of BacteriaShape of Bacteria

RoundRound – cocci – cocci Example – Example – strep – throatstrep – throat

((Streptococcus pyogenesStreptococcus pyogenes))

Shape of BacteriaShape of Bacteria

Rod-shapedRod-shaped - - bacilli bacilli Example – Example – E. coliE. coli

((Escherichia coliEscherichia coli))Usually found in the intestinesUsually found in the intestines

Shape of BacteriaShape of Bacteria

Spiral shapedSpiral shaped – spirilla – spirilla

Example – Example – Lyme diseaseLyme disease

((Borrelia burgdorferiBorrelia burgdorferi))

Movement of BacteriaMovement of Bacteria

FlagellaFlagella – a long whip-like – a long whip-like structurestructure that helps the cell that helps the cell move by move by spinningspinning in place like a in place like a propeller.propeller.

A bacterial cell A bacterial cell can have can have manymany flagella, one or flagella, one or none.none.

If a bacterial cell If a bacterial cell does not have a does not have a flagella, they flagella, they depend on depend on airair, , water or clothing water or clothing to carry them to carry them around.around.

ReproductionReproduction

Bacteria Bacteria splitsplit to reproduce. to reproduce. Some can split every Some can split every 2020 minutes.minutes.

video

Obtaining FoodObtaining Food

Autotrophs Autotrophs – make their own – make their own food.food.

Obtaining FoodObtaining Food

HeterotrophsHeterotrophs – obtain food – obtain food by eating by eating autotrophsautotrophs or other or other heterotrophs.heterotrophs.

Types of BacteriaTypes of Bacteria

Helpful BacteriaHelpful Bacteria

Food: cheese, sauerkraut, pickles, Food: cheese, sauerkraut, pickles, sour cream and yogurtsour cream and yogurt

Helpful bacteriaHelpful bacteria

NatureNature’’s clean-up crew - Bacteria, along s clean-up crew - Bacteria, along with fungus and some insects are with fungus and some insects are decomposers that help break down dead decomposers that help break down dead mattermatter..

Click Click here for a video of decomposing for a video of decomposing matter. (get ready – this is a little intense!)matter. (get ready – this is a little intense!)

Harmful BacteriaHarmful Bacteria

Illness and Illness and HealthHealth

–Strep throat Strep throat and food and food poisoningpoisoning

AntibioticAntibiotic A chemical that can kill A chemical that can kill bacteria.bacteria.