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Water (islands), mountains, as well as deserts act as isolating mechanisms. Continental Drift resulted in the isolation and subsequent development of animals

that are genetically quite different that fill similar niches in the isolated environments.

A comparison of animals that fill similar niches in Australia as compared to the US or

Africa yields Kangaroos and Wallabies that fill the same niches as deer and antelope.

Initial speciation begins as as better adapted animals occupying a niche push the marginalized individuals out into other areas where any unique genetic characteristics

or mutations that make them better able to adapt to a new niche are selected for

based on survival rate.

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9y ago

Vicariance is an isolating mechanism. Vicariance occurs when a physical barrier divides a population and leads to the evolution of a new species.

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Q: What is an isolating mechanism and how does it create a situation leading to speciation?
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Related questions

What is the leading cause of children isolating themselves?

because it's unfair


What is the ending of the selection?

That adaptive change takes place leading to eventual speciation.


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What is divergence in relation to evolution?

Increasing divergence between reproductively isolated populations, occasionally leading to speciation, is one effect of evolution.


What is it called when a population diverges and becomes reproductively isolated?

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What is the principles of mechanisms?

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What type of speciation occurred when a plant population becomes reproductively isolated while living with its parent population?

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How do evolution and microevolution differ?

Miroevolution is the change in allele frequency overtime in populations of organisms not leading to speciation; below the taxa level. Macroevolution is speciation. This terminology is not favored by many biologists because there is some implied difference in processes. That is to get from micro to macro. Actually evolution long enough is macro. So, many biologist prefer the terms. Evolution Speciation instead of micro and macro


What term describes species which arise in non-overlapping geographic regions?

The term that describes species which arise in non-overlapping geographic regions is allopatric speciation. This occurs when a physical barrier separates a population, leading to genetic divergence and the formation of new species.


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