Animals: Select one: A. experience global brain deactivation during sleep and do not dream. B. experience sleep cycles in which REM sleep alternates with slow-wave NREM sleep. C. experience only NREM sleep. D. experience only REM sleep during mating season.

Why was new orleans destined to be the center of slave trade in the southern united states

How much rainfall does the choco region of colombia receive each year a. less the 40 inches b. between 100 and 500 inches c. between 200 and 250 inches d. more then 400 inches

The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.