Geological Evidence Indicates That Two Landmasses, Separated by a Deep

question 88

Multiple Choice

Geological evidence indicates that two landmasses, separated by a deep ocean channel, have been moving apart since 45 million years ago. You are studying a group of organisms that has widespread populations on both of the landmasses. Which is the most likely hypothesis for the group's evolutionary history?

• A) The group's ancestors were definitely present on the original landmass.
• B) The group's ancestors cannot have been present on the original landmass.
• C) If the group's ancestors could not move across the open ocean, it is very likely that they were present on the original landmass.
• D) The group's ancestors must have independently colonized each of the landmasses from a third location within the past 45 million years.

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