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what is macroevolution
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Asked 1/9/2014 9:42:19 AM
Updated 1/11/2014 12:09:46 PM
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User: what is macroevolution

Weegy: Changes in gene frequency that occur within a population without producing a new species are called microevolution. [ As microevolution continues, a population may become so different that it is no longer able to reproduce with members of other populations. At that point, the population becomes a new species. As the new species continues to evolve, biologists might eventually consider it to be a new genus, order, family, or higher level of classification. Such evolution at the level of species or higher is called macroevolution. Microevolution can occur very quickly; indeed, it is probably always occurring. For example, in less than half a century after the discovery of antibiotics, many bacteria evolved resistance to them. Resistance to antibiotics evolves when antibiotics are used improperly, allowing the survival of a few bacteria with mutated genes that confer resistance. Natural selection then leads to the evolution of antibiotic-resistant strains. Pesticide-resistant insects and herbicide-resistant weeds are additional examples of rapid microevolution. ]
latefisher|Points 3420|

User: what is terrestrial environment

Weegy: TERRESTRIAL: 1. Of or relating to the earth or its inhabitants. 2. Having a worldly, mundane character or quality. 3. Of, relating to, or composed of land. 4. [ Biology Living or growing on land; not aquatic: a terrestrial plant or animal. ]
cecillereign|Points 573|

User: what is Commensalism?

Question|Rated bad
Asked 1/9/2014 9:42:19 AM
Updated 1/11/2014 12:09:46 PM
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Macroevolution is evolution on a scale of separated gene pools.
Added 1/11/2014 12:09:12 PM
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3
Commensalism : A symbiotic relationship between two organisms of different species in which one derives some benefit while the other is unaffected.
Added 1/11/2014 12:09:46 PM
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