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Organizing Biological Diversity (Classification)
N/A
21
Biology
Undergraduate 2
04/05/2010

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Term
phylogeny
Definition
evolutionary relationships (history) of taxa
Term
systematics
Definition
the study of biodiversity in an evolutionary context, encompassing taxonomy and phylogeny
Term
taxon
Definition
group of organisms
Term
taxonomy
Definition
the identification, naming, and classification of an organism
Term
Bionomial Nomenclature
Definition
Genus specific epithet (species)
Term
characters
Definition
traits or features of an organism
Term
morphological characters
Definition
based off anatomy and embryology
Term
behavioral characters
Definition
based off of matting patterns, mating calls, etc
Term
molecular characters
Definition
based off of protein sequences, gene sequences, position of genes on a chromosome, etc
Term
homology (between organisms)
Definition
similarity due to recent common ancestry and evolutionary descent
Term
homologous characters
Definition
similar in structure but may differ in function; indicate a common evolutionary descent
Term
nonhomology
Definition
analogy; homoplasy; convergent similarity; character evolved independently for same function
Term
analogous characters
Definition
similar in function but not necessarily in structure; do not reflect a recent common ancestor
Term
dichotomous tree
Definition
branches repeatedly; each branch defined by a derived character
Term
pleisiomorphy
Definition
a primitive (ancestral) character
Term
apomorphy
Definition
a derived (evolved) character
Term
ingroup
Definition
study group; how are they related?
Term
synapomorphies
Definition
shared derived homologues (characters)
Term
synpleisiomorphies
Definition
shared primitive (ancestral) characters
Term
outgroup
Definition
for comparison
Term
sister groups
Definition
share a common ancestor; each others' closest relatives
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