18. The graph in Figure 22.9, below, shows that the extent of the adaptive radia

Question

18. The graph in Figure 22.9, below, shows that the extent of the adaptive radiation of the Galápagos finches is correlated with the number of islands present in the archipelago. What can be concluded from the graph? 20 Number of islands - Number of finch species 15 10 Millions of years ago Biology: How Life Works, Second Edition 2016 WH Freeman and Company This shows that rates of speclation are correlated with the net total land area available. This shows that opportunitles for geographic isolation are a key component of the speclation process. This shows that each island hosts sympatrically speciating populations. This shows that allopatric speciation tends not to occur on islands. This shows that the balance between rates of sympatric and allopatric speciation is governed by mutation rates.

Explanation / Answer

According to given data,13 species of finches called as Darwinian finches feeding on different niche are present on Galpagagos islands.All species have an common ancestor and the birth of different species from a common species is called as adaptive radiation.This shows that opportunities for geographic isolation are a key component of speciation process.

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