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Verbal·Information and Ideas·Command of Evidence
hard
Reported Annual Travel Distances in Four Studies of Migrating Animal Populations
SpeciesContinentDistance (km)Measurement method
Blue wildebeestAfrica650RTD
ElkNorth America1,200GPS
Gray wolfAsia7,247GPS
CaribouNorth America1,250RTD
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
gray wolf would be greater than 1,200 kilometers if the RTD method had been used.
B
blue wildebeest would be greater than 7,247 kilometers if the GPS method had been used.
C
gray wolf would be less than 7,247 kilometers if the RTD method had been used.
D
blue wildebeest would be less than 650 kilometers if the GPS method had been used.