Use the following information to answer the questions below.
About 13 different species of finches inhabit the Galápagos Islands today,all descendants of a common ancestor from the South American mainland that arrived a few million years ago.Genetically,there are four distinct lineages,but the 13 species are currently classified among three genera.The first lineage to diverge from the ancestral lineage was the warbler finch (genus Certhidea).Next to diverge was the vegetarian finch (genus Camarhynchus),followed by five tree finch species (also in genus Camarhynchus)and six ground finch species (genus Geospiza).
-A 14th species that descended from the original ancestral finch,the Cocos Island finch,is endemic to its namesake island,located 550 km off Costa Rica.The Cocos Island finch is genetically much more similar to the tree finches than is the vegetarian finch,yet it is classified in its own genus Pinarolaxias.Moreover,the Cocos Island finch and the vegetarian finch are the two finch species that are most genetically different from the ancestral Galápagos finch.Thus,if classification is to reflect evolutionary relationships,the vegetarian finch should