Systematics and Classification
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| homologous | two organisms have the same feature due to a common ancestor
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| Sarcopterygii | lobe fin fishes including lobe fin fishes and tetrapods
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| Actinopterygii | ray fin fishes
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| Most diversification in spiny ray fishes occurs in... | marine environment
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| Most diversification in soft ray fishes occurs in... | freshwater environment
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| Gnathostomata | Jawed fishes
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| Monophyletic | group of organisms contains all descendants of common ancestor
indicated by shared derived characters or synapomorphies
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| Character | a trait or attribute in systematics
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| Character state | form of the character feature
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| Taxonomy is.... | classification of organisms
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| Systematics is... | the phylogenetic relationships between organisms
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| Categories | levels of classifications
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| taxa | actual name of the organism
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| Phylogenetic Systematics | parsimony analysis- produces max parsimony trees,
developed by Hennig (1966)
classification based on natural or monophyletic groups
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| synapomorphies | shared derived characters that help describe differences between groups
example; the presence of jaws
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| homoplasy | resemblance in groups that is derived independently
convergent evolution
a pattern; not an evolutionary process
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Created by:
jcaughron
Popular Marine Sci Tech 1 sets