Lohmann and Lohmann (2006) Exposed Young Loggerhead Sea Turtles That

Multiple Choice

Lohmann and Lohmann (2006) exposed young loggerhead sea turtles that had never been in the ocean to magnetic fields characteristic of three widely separated regions along the migratory route of the warm, rich waters of the North Atlantic gyre. The loggerheads oriented to each distinctive field by swimming in a direction that would have kept them in the favorable waters of the gyre if they had been migrating. This demonstrated that hatchling loggerheads

A) are programmed to swim in a particular direction when they encounter characteristic magnetic fields found in critical regions of the gyre.
B) have an obvious conscious mental representation of their geographic position and their position relative to their goal.
C) need a sun compass to help them pinpoint the critical safe regions in the North Atlantic gyre, unless they are accompanied by adults.
D) need to learn that they should swim in a particular direction when they encounter characteristic magnetic fields found in critical regions of the gyre.