EVOLUTION
EVOLUTION OF A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When two populations can no longer produce offspring
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When two populations can no longer produce viable offspring
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When two populations can produce viable, fertile offspring
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When the two populations can no longer produce viable, fertile offspring
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Detailed explanation-1: -1. Reproductive isolation is when gene flow between groups of organisms stops. When populations can no longer reproduce with each other, gene flow between those populations stops. This makes it possible for two populations from one original species to evolve into two new species.
Detailed explanation-2: -Speciation is the process by which new species form. It occurs when groups in a species become reproductively isolated and diverge. In allopatric speciation, groups from an ancestral population evolve into separate species due to a period of geographical separation.
Detailed explanation-3: -Reproductive isolation can be either prezygotic (barriers that prevent fertilization ) or postzygotic (barriers that occur after zygote formation such as organisms that die as embryos or those that are born sterile).
Detailed explanation-4: -Reproductive isolation occurs when a population splits into two groups and the two populations no longer interbreed. When populations become reproductively isolated, they can evolve into two separate species.
Detailed explanation-5: -Reproductive isolation is a mechanism that keeps species from mating with others. Prezygotic isolation prevents the fertilization of eggs while postzygotic isolation prevents the formation of fertile offspring.