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Verbal·Information and Ideas·Command of Evidence
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Reported Annual Travel Distances in Four Studies of Migrating Animal Populations
SpeciesContinentDistance (km)Measurement method
Mule deerNorth America772RTD
CaribouNorth America3,807GPS
Gray wolfNorth America2,155GPS
White-eared kobAfrica400RTD
Some studies of migrating animals measure how far the animals travel in a year by fitting individuals with GPS tracking collars. Other studies track annual round-trip distance (RTD), which is equal to double the distance separating the two habitats a population migrates between each year. A researcher argues that since GPS records all of an animal’s movements, using the GPS method to track a population would result in significantly higher recorded travel distances than using the RTD method would. For example, it’s very likely that the distance reported for the __________
Which choice most effectively uses data from the table to complete the example?
A
caribou would be greater than 2,155 kilometers if the RTD method had been used.
B
caribou would be less than 3,807 kilometers if the RTD method had been used.
C
white-eared kob would be less than 400 kilometers if the GPS method had been used.
D
white-eared kob would be greater than 3,807 kilometers if the GPS method had been used.