EVOLUTION
EVOLUTION OF A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Occurs when a physical barrier divides one population into two or more populations
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Occurs when a reproductive barrier divides one population into two or more populations
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Occurs when species evolve into a new species without a physical barrier
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Occurs when species into into a new species at random
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Detailed explanation-1: -Allopatric speciation (1) occurs when a species separates into two separate groups which are isolated from one another. A physical barrier, such as a mountain range or a waterway, makes it impossible for them to breed with one another.
Detailed explanation-2: -Allopatric speciation, also known as geographic speciation, is speciation that occurs when biological populations of the same species become isolated due to geographical changes such as mountain building or social changes such as emigration.
Detailed explanation-3: -New species arise through a process called speciation. In speciation, an ancestral species splits into two or more descendant species that are genetically different from one another and can no longer interbreed. Darwin envisioned speciation as a branching event.
Detailed explanation-4: -Allopatric speciation is typically subdivided into two major models: vicariance and peripatric. Both models differ from one another by virtue of their population sizes and geographic isolating mechanisms.
Detailed explanation-5: -Allopatric speciation is the most common form of speciation. Allopatric speciation is speciation that happens when due to geographic changes two populations of the same species become isolated from each other. Gene flow between the population ceases when the populations become geographically isolated from each other.