Question

question 7 (1 point)
about thirteen different species of finches inhabit the galápagos islands today, all
q descen dants of a common ancestor from the south american mainland that arrived a
few million years ago. genetically, there are four distinct lineages, but the thirteen
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). if the six
ground finch species have evolved most recently, then which of these is the most
logical prediction?
o a) their genomes should be more similar to each other than are the genomes of
the five tree finch species.
o b) the chances of hybridization between two ground finch species should be
less than the chances of hybridization between two tree finch species.
o c) they should be limited to the six islands that most recently emerged from the
sea.
o d) they should share fewer anatomical homologies with each other than they
share with the tree finches.

Explanation:

Step1: Analyze the relationship between species and genomes

Species that are more closely related (evolved more recently from a common ancestor) should have more similar genomes. The six ground - finch species (genus Geospiza) evolved most recently among the given groups.

Step2: Evaluate each option

• Option a: The five tree finch species are not the most recently evolved compared to the ground finches.
• Option b: Hybridization chances are not directly related to the similarity of genomes in terms of recent evolution as asked in the prediction.
• Option c: Limiting to islands is not relevant to genome similarity based on recent evolution.
• Option d: Tree finches are a different group and not the most recently evolved like the ground finches.

Answer:

c) They should be limited to the six islands that most recently emerged from the sea.