In a Study on Golden-Mantled Ground Squirrels from North America

question 6

Essay

In a study on golden-mantled ground squirrels from North America, young raised in an environment with constant darkness and temperature entered into hibernation the same time each year. In a similar study on stonechats from Kenya, offspring raised in an environment with constant temperature and photoperiod maintained an annual reproductive cycle, but this cycle shifted out of phase over time. What information about the two species' environments most likely explains this difference in experimental results between the squirrels and stonechats?

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