Information and IdeasHardInference from relatedness
Information and Ideas practice question
The island's lizards are found nowhere else, yet they are most closely related to a species on the mainland 300 kilometres away — not to any of the lizards on the neighbouring islands. This suggests that ____
Which choice most logically completes the text?
- A. the island lizards' ancestors arrived from the mainland rather than from the nearby islands.Correct
- B. the island lizards regularly swim 300 kilometres.
- C. the neighbouring islands have no lizards at all.
- D. the island lizards are identical to the mainland species.
Answer: A. the island lizards' ancestors arrived from the mainland rather than from the nearby islands.
Closest kin on the distant mainland, not on nearby islands: the line came from the mainland.
Why the other answers are wrong
- B. the island lizards regularly swim 300 kilometres.
- Ancestral arrival doesn't require present-day lizards to swim anywhere.
- C. the neighbouring islands have no lizards at all.
- The text mentions lizards on the neighbouring islands.
- D. the island lizards are identical to the mainland species.
- The island lizards are 'found nowhere else', so they aren't the same species.
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