Question

one hypothesis in the barn-swallow study was that long-tailed swallows would produce more offspring than average-tailed swallows. which would represent the control group used to test this hypothesis? the swallows with darker-colored tails the swallows with shorter-than-average tails the swallows with longer-than-average tails the swallows with average-length tails

Answer 1

This is the correct answer, I even provided proof from my own test. Hope this helps!

Answer 2

I think the correct answer from the choices listed above is the last option. The control group to be used to test the hypothesis would be the swallows with average-length tails. A control group is defined as the group in an experiment or study that does not receive treatment by the researchers.