macroevolution


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mac·ro·ev·o·lu·tion

 (măk′rō-ĕv′ə-lo͞o′shən, -ē′və-)
n.
Large-scale evolution occurring over a very long period time that results in the formation of new species and higher-level taxonomic groups.

mac′ro·ev′o·lu′tion·ar′y (-shə-nĕr′ē) adj.

macroevolution

(ˌmækrəʊˌiːvəˈluːʃən)
n
(Biology) biology the evolution of large taxonomic groups such as genera and families
ˌmacroˌevoˈlutionary adj

mac•ro•ev•o•lu•tion

(ˌmæk roʊˌɛv əˈlu ʃən; esp. Brit. -ˌi və-)

n.
major evolutionary change of species and taxa.
[1935–40]
mac`ro•ev`o•lu′tion•ar′y, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.macroevolution - evolution on a large scale extending over geologic era and resulting in the formation of new taxonomic groupsmacroevolution - evolution on a large scale extending over geologic era and resulting in the formation of new taxonomic groups
organic evolution, phylogenesis, phylogeny, evolution - (biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms
References in periodicals archive ?
The evolutionary trend that led from large, apex predators to gentle, suspension-feeding giants during the highly productive Cambrian period is one that has also taken place several other times throughout Earth's history, according to lead author Dr Jakob Vinther, a lecturer in macroevolution at the University of Bristol.
Hans Larsson, Canada Research Chair in Macroevolution at McGill University and an associate professor at the Redpath Museum, explained that many of the changes that were observed in these fish matched the fossil records.
Hans Larsson, Canada Research Chair in Macroevolution at McGill University, said excavating plant fossils preserved in rocks deposited during the last days of the dinosaurs, they found some preserved with abundant fossilized charcoal and others without it.
Dr Jakob Vinther, a lecturer in macroevolution at the University of Bristol, said: "The fact that large, free-swimming suspension feeders roamed the oceans tells us a lot about the ecosystem.
Introduction: demography and cultural macroevolution.
The other is that developmental genetics offers keys to understanding macroevolution.
Since chapter one presumes an ancient earth in order to overcome the dichotomy between micro- and macroevolution, chapter two takes up the question "Can We Really Know the Earth Is Billions of Years Old?
Family level phylogenies reveal modes of macroevolution in RNA viruses.
This activity offers one way to teach students about macroevolution by demonstrating that variation in the development of individuals is fodder for large changes in shape.
David Sepkoski's admirable essay on macroevolution addresses both familiar (such as the pace of evolution and the ontological status of evolutionary units) and not so familiar issues (such as whether microevolutionary mechanisms explain macroevolutionary patterns).
In particular, Ebifegha is critical about the use of ambiguous terms such as microevolution and macroevolution and proposes new terminologies that lead to correct interpretation of the scientific evidence.
Microevolution emerges within the firm, with the manager learning from the firm's competitive environment, and adapting, as the firm abuts other firms within a nested (Garud and Van de Ven 1992) macroevolution of dynamics within the domestic and international marketplaces (McKelvey 1997).