EVOLUTION
PATTERNS OF EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An eight-lane highway dividing a population of snails with limited mobility
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A narrow, but deep, river dividing a population of hummingbirds
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A narrow, but deep, river dividing a population of white-footed mice (not known for their swimming ability)
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A patch of land bisecting a river and dividing a population of minnows
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A mountain range dividing a population of moths
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Detailed explanation-1: -In sympatric speciation, groups from the same ancestral population evolve into separate species without any geographical separation.
Detailed explanation-2: -They result from natural selection, sexual selection, or even genetic drift: The evolution of different mating location, mating time, or mating rituals: Genetically-based changes to these aspects of mating could complete the process of reproductive isolation and speciation.
Detailed explanation-3: -A pretty common example of geographic isolation is a population migrating to an island and becoming separated from the mainland population. This stops the gene flow between the groups of organisms. Over time, the two populations become reproductively isolated and they evolve separately.
Detailed explanation-4: -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.