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Bio 1620 Chapter 24 Phylogeny
Terms in this set (25)
What is a phylogeny?
the history of the evolution of a species or group, especially in reference to lines of descent and relationships among broad groups of organisms.
What is systematics?
What kind of information is used by systematists to infer evolutionary relationships?
How does taxonomy differ from systematics?
Taxonomic hierarchy (of the Linnaean system) is used to classify organisms.
What is indicated about the degree of similarity and phylogeny of taxa at different ranks in the Linnaean system of classification?
What is a phylogenetic tree?
What are phylogenetic trees intended to show?
How does a monophyletic taxon differ from a polyphyletic taxon?
What is a paraphyletic taxon?
How do homologous characters differ from homoplastic (aka analogous) characters?
ystematic approach called cladistics.
What is the basis for making decisions regarding evolutionary relationships using the cladistical approach?
Be able to distinguish between shared derived character states and shared ancestral character state
What is a synapomorphy?
What is a symplesiomorphy?
Be able to construct and interpret a simple phylogenetic tree.
hat is represented by each node of the tree?
How is an outgroup used in the construction of a phylogenetic tree?
How is the principle of parsimony used to choose between possible phylogenetic trees for a lineage of organisms?
When is (the statistical approach of) maximum likelihood more useful than parsimony for evolutionary relationships?
What is the "molecular clock," and what is it used for?
What assumptions are intrinsic in the use of the molecular clock to date evolutionary divergence of clades of organisms?
What is horizontal gene transfer?
horizontal gene transfer
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