13A Dichotomous Key

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Dichotomous key
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Terms in this set (12)
Dichotomous key
a tool for the identification of organisms based on a series of choices between alternative characters
Image: Dichotomous key
Linked dichotomous key
Questions are laid out in order and linked to other lines below
Image: Linked dichotomous key
Branching tree dichotomous key
A type of dichotomous key on which options at shown where the tree branches (similar to cladogram)
Image: Branching tree dichotomous key
Couplet
Series of paired statements in a dichotomous key
Image: Couplet
2
Number of choices in each couplet
Image: 2
Physical/observable
Type of traits used in a dichotomous key
Image: Physical/observable
Order in a dichotomous key
Start at #1, then follow directions afterwards
Image: Order in a dichotomous key
binomial nomenclature
Classification system in which each species is assigned a two-part scientific name
Image: binomial nomenclature
Genus
First part of the scientific name (first letter capitalized)
Image: Genus
species
2nd part of the scientific name (first letter lower case)
Image: species
Cladogram
Diagram that shows the evolutionary relationships among a group of organisms
Image: Cladogram
Tree of Life
the phylogenetic tree that includes all organisms
Image: Tree of Life

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