Formation of several species of finches in Galapagos islands or marsupials in Australia is ?

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Sympatric speciation

Phyletic speciation

Allopatric speciation

Fusion speciation

answer is C.

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Detailed Solution

Concept: The process of speciation is evolutionary. As the populations change, new species emerge. Charles Darwin explained how natural selection contributes to speciation.
In nature, there are four different geographic modes of speciation.
Allopatric, sympatric, peripatric, and parapatric are the four modes. Geographically isolated populations experience allopatric speciation, whereas populations that can coexist in the same area experience sympatric speciation. The Galapagos finches are the primary example of allopatric speciation. Charles Darwin researched it. Finches come in around 15 different species. They all have distinctive appearances and unique beaks. An example of sympatric speciation is the hawthorn fly.
Hence, option 3 is the correct answer.

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