Meat powder elicits salivation in dogs. Pavlov discovered that when he rang a bell before presenting meat powder to dogs, the bell would eventually come to elicit salivation without being paired with the meat powder. After being paired with the meat powder repeatedly, the bell becomes a/an ___.

Which leader was the first african american president at two different institutions for higher learning

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.

What nitrogenous bases are found in rna