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What isolating mechanism discourages mating outside the species?
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Is ecological isolation a prezygotic isolating mechanism?
Sure is. How can one mate if an ecological barrier is erected between two biological species? Even something as simple as the time of day can be a barrier to mating.
What type of isolating mechanism was important in the formation of Galapagos finch species?
Geographic IsolationSpeciation in the Galápagos finches occurred by founding of new populations, geographic isolation, gene pool changes, reproductive isolation, and ecological competition.
How do postzygotic isolating mechanisms reinforce prezygotic ones?
Prezygotic, of course. Unless the behavior was to expel unwanted sperm or something like that. Generally the mating behaviors prevent ( pre ) any zygotes from having any possibility of being formed.
What type of reproductive isolating mechanism is described by a situation in which female fireflies only mate with males who emit light in a particular pattern?
The form of reproductive isolation that is practiced by different species of butterflies is sexual isolation by conduct. This means that the pattern of flashing lights that the male firefly exhibits is specific to that species, and a variation will cause a female firefly to ignore them.
Natural selection is the mechanism which proved species?
have chromosomes.
What is an isolating mechanism and how does it create a situation leading to speciation?
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.
Why do geographical isolation is not regarded as a reproductive isolating mechanism?
Geographical isolation is not a cause of speciation in an asexually reproducing organism because the population is self-pollinating and would be less prone to the factors which results from geographical isolation.
The lack of a mechanism hampered the acceptance of the idea that?
Species change over time
Can microevolution form a new species?
Yes. In fact, microevolution, or allelic variance, is the mechanism by which new species emerge. Such an emergence is part of what some people call macroevolution. In other words, microevolution is the mechanism by which macroevolution is produced.
Two species breeding at different times describes what isolating mechanisms?
Temporal isolation: Individuals do not mate because they are active at different times. This may be different times of the day or different seasons. The species mating periods may not match up. Individuals do not encounter one another during either their mating periods, or at all. Source:Wikipedia: Isolating mechanisms
Which mechanism do the different organism populations found across the tundra exemplify?
Species diversity :)
What is the process called where the environment in which a species lives causes a change to the collective genes of that species?
Natural selection, which is the mechanism for evolution.
