Question:

what is speciation?

by Guest297  |  12 years, 8 month(s) ago

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Species must undergo the process of reproductive isolation for speciation to take place. For example, the damselfly evolved to form differing genitalia, and members became physically incapable of mating with one another. Reproductive isolation needn't be so drastic, however. Members of a single species can evolve to create different mating rituals, ones that won't attract members of the other species. They may also mate at different times of the day, month, season or year. Or they can evolve to mate in different places, for example on two different types of fruit, as in the example given above for sympatric speciation.

So when a population finds itself isolated in one way or another from the rest of a species, speciation occurs, right?

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  1. Merlyn
    There are those who believe in phyletic gradualism, the thought that the process of speciation takes place constantly and over long periods of time. Others believe in punctuated equilibrium. These people believe that speciation takes places in quick jumps and starts, with long periods of time between events. Both groups have the fossil record to contend with.

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