The Galapagos archipelago appeared about 2 million years ago, when submerged volcanoes (seamounts) rose above the ocean's surface. A single hypothetical colonization event introduced a species of finch to one island in the distant past. Today, several islands in the archipelago contain unique species of finches. What must have happened following the initial colonization event to account for the current situation?
1. cladogenesis
2. anagenesis
3. allopatric speciation
4. adaptive radiation
A) 1 and 3
B) 1 and 4
C) 2 and 3
D) 1, 3, and 4
E) 2, 3, and 4
Answer:
D) 1, 3, and 4
1. cladogenesis
3. allopatric speciation
4. adaptive radiation
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