Ch. 17 Flashcards Preview

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Flashcards in Ch. 17 Deck (24):
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classification

grouping objects for organisms based on a set of criteria

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taxonomy

a discipline of biology primarily concerned with identifying, naming, and classifying species

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binomial nomenclature

gives each species a name hat had two parts

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taxon

a named group of organisms

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genus

a group of species that are closely related and share a common ancestor

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family

next higher taxon after genus; consisting of similar, related genera

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order

contains related families

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class

contains related orders

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phylum/division

contains related classes

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kingdom

taxon composed of related phyla/ divisions

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domain

the broadest of all the taxi & contains one or more kingdoms

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phylogeny

the evolutionary history of a species

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characters

inherited features that vary among species

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molecular clock

model that is used to compare DNA sequences from two different species to estimate how long the species have been evolving since they diverged from a common ancestor

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cladistics

method that classifies organisms according to the order that they diverged from a common ancestor

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cladogram

branching diagram that represents the proposed phylogeny/evolutionary history of a species/group

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bacteria

prokaryotes whose cell walls contain peptidoglycan

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Archie

more ancient than bacteria & yet more closely related to eukaryote ancestors (domain)

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eukarya

all organisms with eukaryotic cells (domain)

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protists

eukaryotic organisms that can be unicellular, colonial, or multicellular

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fungus

unicellular/multicellular eukaryotes that absorbs nutrients from organic material in its environment

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plantae

species of plants (kingdom)

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animalia

species of animals (kingdom)

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dichotomous key

classification tools