7 results found

Search Results for: extinction-level event

Extinction-level event

Definition noun An event in geologic time where one of more species became extinct over a relatively short period of time,... Read More

Mass extinction

Definition noun The extinction of one of more species in a relatively short period of geological time, usually as a... Read More

Biotic crisis

Definition noun A biological event depicted by the extinction of one of more species over a relatively short period of... Read More

The role of extinction in evolution

Colloquium Paper Ths paper was presented at a colloquium entled "Tempo and Mode in Evolution" organized by Walter... Read More

Animal

Animal Definition An animal (plural: animals) refers to any of the eukaryotic multicellular organisms of the biological... Read More

Biodiversity

Biodiversity Lead Author: J. Emmett DuffyThis article has been reviewed and approved by the following Topic Editor: John... Read More

Oxygen

Oxygen Definition In biochemistry, oxygen is theĀ colorless, odorless, gaseous element represented by the symbol "O", with... Read More