Biology, 23.07.2019 09:00 kingje1477
Susan trained her rat to press a bar in a skinner box in order to get a food pellet. susan's rat pressed the bar a lot. however, later when susan ran out of food pellets, her rat eventually stopped pressing the bar. what had happened?
Answers: 1
Biology, 22.06.2019 19:30, Aracelys3946
Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?
Answers: 1
Biology, 23.06.2019 05:00, bessieyounger1211
The boiling point of a substance in city a is found to be 145 degrees celcius. the boiling point of the same substance in city b is 141 degrees celcius. which city, a or b, is at a higher elevation? how do you know? asap
Answers: 1
Susan trained her rat to press a bar in a skinner box in order to get a food pellet. susan's rat pre...
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