Self-study
Scientist: Support A small group of islands near Australia is inhabited by several species of iguana; Support closely related species also exist in the Americas, but nowhere else. ███ ███████ ██ ████████ ██████ ████ █████ ███ █████████████ ██ █████████ ███ ███████ ██████████████ ████ ████████ ███████████ █████ ███████ ███ ██████████ █████ █████ ██████████ ███████████ ████ ████ ██████ ██ ████████ ██████ ██████ ███ ███████ █████ ████ ███ █████████
Summarize Argument: Phenomenon-Hypothesis
The scientist hypothesizes that the iguanas’ ancestors reached the islands near Australia by rafting from the Americas. As support, he points out that the only closely related species that currently exist are located in the Americas. He also notes that the islands first formed in isolation, away from any land masses, which implies that species could only exist there now if their ancestors had somehow arrived from elsewhere.
Notable Assumptions
The scientist assumes that the closely related species in the Americas have the same ancestor as the island iguanas. He further assumes that this common ancestor has only ever lived in the Americas and nowhere else.
Analysis by AlbertGauthier
25.
Which one of the following, ██ █████ ████ ███████ ███ ███████████ █████████
a
A number of ██████ ███████ ████ ███████ ███ ███████ ███ ███ █████ ██ ███ █████████
b
Genetic analysis indicates ████ ███ ██████ ███████ ██ ███ ███████ ███ █████████ ██ ███████ ████████ ████ █████ █████ ██ ███ █████████
c
Documented cases of ███████ ███████ ████ █████████ ███████ ████ ██████ ███ █████████
d
Fossils of iguana ███████ ███████ ███████ ██ █████ ████ ███████ ███ ███████ ████ ████ █████ ██ ██████████
e
The lineages of ████████ █████ ███ ██████ ███████ █████ ██ █████████ ██ ██ █████ ███████ ████ ████ ██ █ ██████ █████ ██ ███ █████████████ ██ █████████