Ch. 16 Systematics
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Science has identified nearly ___ million species of plants and animals
E. O. Wilson suggests that there are possibly __-__ million species present on the planet.
Encompasses the science of taxonomy, including classification as a process that involves identifying new species and classifying individuals into groups with names that describe their position in the classification system.
The naming of groups of organisms and the rules governing the application of these names
Each organism is assigned a __
The genus name is always __ and the species names is always ___. This Latin scientific name is always ___ or underlined when written.
- lower cased
The "classical species concept"
The morphological-species concept
Concept defined by Mayr as having two aspects: 1) a group of interbreeding populations, 2) reproductive isolation from other such groups
This concept uses genetic divergence based on allelic frequencies that can be measured by statistical methods
The genetic-species concept
Concept that defines a species as "a lineage which occupies and adaptive zone minimally different from that of any other lineage in its range and which evolves seperately from all lineages in its range."
Concept uses lineages, but with single branches. Focuses on the phylogenetic relationships.
Concept that defines each species as a population of independently evolving lineage
General Lineage Concept
the evolutionary relationships among organism
recently evolved traits or features
similarities inherited with little or no change from a common ancestor
the development of similar characters or states in different lineages but without a common direct ancestry
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