Question: Building A Dichotomous Key To Identify Bacteria Dichotomous Keys Are Kind Of Like Flow Charts That Help Us Identify A Particular Organism – In This Case, Enteric Microorganisms. It Is Based On Characteristics That Have “yes Or No” Answers. Either The Bacterium Does Have The Characteristic, Or It Does Not! Organism Gram- Negative Rod Oxidase Ferment …

Question: Building A Dichotomous Key To Identify Bacteria Dichotomous Keys Are Kind Of Like Flow Charts That Help Us Identify A Particular Organism – In This Case, Enteric Microorganisms. It Is Based On Characteristics That Have “yes Or No” Answers. Either The Bacterium Does Have The Characteristic, Or It Does Not! Organism Gram- Negative Rod Oxidase Ferment …

Building a Dichotomous Key to Identify Bacteria Dichotomous keys are kind of like flow charts that help us identify a particu

Show transcribed image text

Transcribed Image Text from this Question

Building a Dichotomous Key to Identify Bacteria Dichotomous keys are kind of like flow charts that help us identify a particular organism – in this case, Enteric microorganisms. It is based on characteristics that have “yes or no” answers. Either the bacterium does have the characteristic, or it does not! Organism Gram- negative rod Oxidase Ferment glucose to produce acid Ferment lactose to HS Indole produce produced? produced? acid Citrobacter freundii + + + + Escherichia coli + 1 + + + Enterobacter derogenes + 1 + + – Shigella sonnei + 1 + 1 Salmonello enterica + + + In the Enteric characterization table above, all the organisms are Gram-negative rods that produce oxidase and ferment glucose to produce an acid. So, that makes the root of our tree it’s something they all share and does not ask a question. Use the remaining characteristics to build a key below: