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29 Cards in this Set
- Front
- Back
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shared characteristics |
common characteristics between relatives |
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ribosomal RNA genes |
the genes scientists most often use for looking at relationships |
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domains |
three main groups of ribosomal RNA genes |
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archaea |
prokaryotic organisms that are found in about every environment on earth |
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bacteria |
prokaryotic organisms that break down things |
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eukarya |
plant and animal organisms |
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phylogenetic trees |
trees that scientists draw to show relationships |
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taxon |
a group of related organisms in a bio classification system |
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phylogeny |
the evolutionary history of life on earth |
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universal ancestor |
what all current life comes from |
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rooted |
trees drawn with a branch representing a common ancestor |
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nodes |
where branches meet |
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sister group |
groups that branch from the base of the three and are different from other groups |
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systematic biology (systematics) |
the science of naming and organizing living things |
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taxonomy |
naming of living things |
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classification |
organizing of living things |
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binomial |
two words |
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binomial nomenclature |
1st part is genus. 2nd part species name |
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specific epithet |
species name, 2nd part of binomial nomenclature |
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dichotomous key |
a series of 2 answer questions used to identify things. |
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taxonomy hierarchy |
all categories and sub categories |
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classical systematics |
traditional organization |
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division |
another word for phylum |
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monophyletic |
all organisms in the group come from a common ancestor |
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paraphyletic |
all organisms come from a common ancestor, but not all descendants are included in the group |
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polyphyletic |
grouped because of common characteristic not ancestor |
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kingdoms |
organisms in each domain are sorted into these |
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embryophytes |
land plants |
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generea |
other name, genus or genetic (a taxa) |
