Biology 1001A Lecture Notes - Lecture 17: Distant Relatives, Carl Linnaeus, Archaea
1 Apr 2016
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Sympatric speciation; causes reproductive isolation even when populations are living in close proximity. Accidentally producing diploid gametes, triploid offspring will be reproductively isolated. Many plant species appear to have evolved through this sympatric, polyploid speciation mechanism (it (cid:272)a(cid:374)(cid:859)t i(cid:374)ter(cid:271)reed with the pare(cid:374)t populatio(cid:374) (cid:271)ut it (cid:272)a(cid:374) self-fertilize and instantly create a new, reproductively isolated species) The meaning of systematics, phylogeny, phylogenetic tree, classification, taxon, taxonomic hierarchy. Systematics biology: branch of biology that studies the diversity of life and its evolutionary relationships. Phylogenetic tree: branching diagram depicting evolutionary relationships of groups of organisms o. Classification: arrangement of organisms into hierarchical groups that reflect their relatedness. Taxon: name designating a group of organisms included within a category of the linnaean taxonomic hierarchy. Taxonomic hierarchy: system of classification based on arranging organisms into even more inclusive categories. Why similarities in morphology or lifestyle do not necessarily reflect close. Explain why similarities in morphology (or lifestyle) do not necessarily reflect close relatedness. (provide examples)
