Question

Why is it likely that MOST speciation is allopatric?Because disruptive selection between forms of traits in sympatric populations is always very strong.Because vicariance events are common.Because related species are always found in allopatry rather than in sympatry.Because gene flow between populations prevents genetic divergence in sympatry.Because gene flow between diverging populations is strong in allopatry.

Answer 1

Most speciation is likely to be allopatric because it involves the geographic separation of populations, restricting gene flow between them and allowing for genetic divergence and the development of new species over time.

Step-by-step explanation:

In most cases, speciation occurs through allopatric speciation, which involves the geographic separation of populations from a parent species and subsequent evolution. This is because isolation of populations is more likely to occur and persist in allopatry than in sympatry. Allopatric speciation can result from events such as dispersal, where a few members of a species move to a new area, or vicariance, where a natural situation physically divides organisms. This geographic separation restricts gene flow between populations, allowing for genetic divergence and the development of new species over time.

Answer 2

Because gene flow between populations prevents genetic divergence in sympatry

Step-by-step explanation:

Allopatric speciation is a form of speciation (creation of new species) that occurs as a result of geographic isolation. This means that a part of population becomes physically separated from the initial main population. There is no gene flow between these two populations and as a result the two populations reach a high level of genetic divergence. They can no longer interbreed which means they become two different species (speciation).

New populations evolve as result of mutation, genetic drift and natural selection.

Sympatric speciation is a form of speciation without geographic isolation, usually due to the reproductive isolation or changes in the chromosomes of the organism.