Research suggests that REM sleep in animals is homeostatically regulated: animals compensate for periods of REM sleep deprivation by increasing subsequent REM sleep. When on land, fur seals get enough REM sleep, but during the weeks they’re in the water, they get almost none. In a study of fur seals’ sleep habits, researchers recorded the REM sleep (as a percentage of baseline) of fur seals once they had returned to land. They concluded that REM sleep may not be homeostatically regulated in fur seals, citing as evidence the fact that the seals in the study ______

Question

Which choice most effectively uses data from the graph to complete the text?
Choose 1 answer:
Choose 1 answer:
(Choice A) showed no significant differences from one another in baseline levels of REM sleep.
A
showed no significant differences from one another in baseline levels of REM sleep.
(Choice B) didn’t show significantly less REM sleep during the second day after returning to land than they did during the first day.
B
didn’t show significantly less REM sleep during the second day after returning to land than they did during the first day.
(Choice C) didn’t consistently demonstrate a significant increase in REM sleep after their period of deprivation in the water.
C
didn’t consistently demonstrate a significant increase in REM sleep after their period of deprivation in the water.
(Choice D) showed no significant difference between REM sleep after returning to land and REM sleep while in the water.
D
showed no significant difference between REM sleep after returning to land and REM sleep while in the water.

Answer 1

C) didn’t consistently demonstrate a significant increase in REM sleep after their period of deprivation in the water.