Unit 11: Dichotomous Key & Taxonomy

7.11A Examine organisms or their structures such as insects or leaves and use dichotomous keys for identification  Binomial Nomenclature - 2 word naming system o Genus species (underlined) o Genus species (italized) o G. species (abbreviated)  Dichotomous Key – A tool that consists of a series of yes/no questions about organism’s structures to classify and name them o Always start with question 1 o A or B will be true for the organism o Follow the YES’s until you arrive at a name o Some questions may be skipped, just follow the yes’s  Common insect features

 Common leaf structures Simple Compound (leaflet placement on (leaflet placement on (leaflet placement on stem) stem) stem) (single leaf) (many leaflets) Alternate Opposite Whorled (around)

Heart-shaped (edge) Lobed or rounded (edge) Wavy (Crenate) (edge) Toothed serrated Broad Shape - Pinnate Singular vein rough jagged (edge) Smooth / Viens – extend from middle Oval (shape) Oval (shape)

Narrow Bristle Tip Scale-like Needle-like Palmate Branching Veins Cluster of 5 Veins extend from base

6.12 D Identify the basic characteristics of organisms, including prokaryotic or eukaryotic, unicellular or multicellular, autotrophic or heterotrophic, and mode of reproduction, that further classify them in the currently recognized Kingdoms  Levels of taxonomic classification o Broadest  Smallest . DomainKingdomPhylumClassOrderFamilyGenusSpecies o Smallest  Broadest . SpeciesGenusFamilyOrderClassPhylumKingdomDomain  3 currently recognized Domains – Bacteria, Archaea, Eukarya  6 currently recognized Kingdoms – Bacteria, Archaea, Protist, Fungi, Plantae, Animalia o Must know characteristics that classify organisms into each Kingdom (chart) o If an organisms is prokaryotic and sexual – it must be in Domain Archaea o If an organism is eukaryotic, multicellular, autotrophic – Domain Plantae o If an organisms is eukaryotic, unicellular, auto or heterotrophic – Domain Protist