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29 Cards in this Set
- Front
- Back
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Atavistic traits
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A hereditary trai that represents a reversion to an ancestral state
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Cambrian explosion |
A major increase in the diversity of life on Earth that occurred about 530 million years ago, during the Cambrian period. Cambrian explosion lasted 5-10 years in which time large and complex forms of most living animal phyla appeared suddenly in the fossil record. |
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Class |
In reference to biological classification systems, the level in the Linnaean hierarchy above order and below phylum. |
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Cretaceous extinction |
A mass extinction that occurre 65 million years ago, wiping out many marine inbertebrates and terrestrial plants and animals, including the last of the dinosaurs. |
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Domain |
In reference to biological classification systems, the highest level in the Linnaean hierarch, immediately above kingdom. The three domains are Bacteria, Archaea, and Eukarya |
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Evo-Devo |
Evolutionary Development biology |
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Family |
In reference to biological classification systems, the level in the Linnaean hierarchy above genus and below order |
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Genus |
In reference to biological classification systes, the level in the Linnaean hierarchy above species and below family |
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Geologic time |
A time scale spanning millions of years, relating to particular time periods to events in Earth's geologic history |
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Homeotic gene |
Any of a class of genes that cause the development of structures in embryological development |
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Kingdom |
In reference to biological classification systems, the level in the Linnaean hierarchy above phylum and below domain. Generally , six kingdoms are recognized: Bacteria, Archaea, Protista, Plantae, Fungi, and Animalia. |
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Lineage |
A group of closely related individuals, species, genera, or the like, depicted as a branch on an evolutionary tree. |
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Linnaean, hierarchy |
The classification scheme used by biologists to organize and name organisms. 8 levels. Domain, kingdom, phylum, class, order, family, genus and species |
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Macroevolution |
The rise and fall of major taxonomic groups due to evolutionary radiations that bring new groups to prominence and mass extinctions in which groups are lost. |
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Mantle |
The layer of Earth's interior that sits just below the crust and extends to the core. It is composed of hot, semisolid rock |
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Mass extinction |
An event during which large numbers of species become extinct throughout most the Earth. |
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Most recent common ancestor |
The ancestral organism from which a group of descendants rose.. |
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Node |
The moment in evolution,m depicted as a point on an evolutionary tree, at which one lineage split, or diverged, into two separate lineages. |
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Order |
In reference to biological classification systems, the level above Family and below class |
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Permian extinction |
The largest mass extinction in the history of life on Earth; it occurred 250 million years ago, driving up to 95 percent of species in some groups to extinction. |
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Phylogenetics |
The study of evolutionary relationships between organisms |
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Plate tectonics |
earths crust several interlocking plates. |
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Radioisotope |
An unstable, radioactive form of an element that releases energy as it decays to more stable forms at a constant rate over time. |
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Scientific name` |
The unique two-part name given to each species that consists of, first, Latin name designating the genus and, second, a Latin name designating that species. |
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Shared derived trait |
An evolutionary novelty shared by an ancestor and its descendants but not seen in groups that are not diredt descendants of that ancestor. |
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Species |
All individuals that can interbreed in their natural surroundings to produce fertile offspring. |
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Supercontinent |
Massive landform by fusing multiple continents. |
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Taxon |
Also called taxonomic group. A gorup defined within the Laean hierarch for example a species or a kingdom. |
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Taxonomy |
Theb ranch of biology that deals with the naming of organisms and with their classification in the Linnaean hierarchy. |
