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GELO #6 – Question 10 Niko Tinbergen (1907 – 1988) was a Swe…

GELO #6 – Question 10 Niko Tinbergen (1907 – 1988) was a Swedish Ethologist (animal behaviorist) famous for studying animals in their native habitats. One of his classic experiments involved a bird called the black-headed gull (Larus ridibundus). Black-headed gulls build nests of twigs on the ground and lay light brown eggs that are covered with dark brown spots. However, the inside of the egg is white in color. Tinbergen noticed that adult gulls pick up the eggshells shortly after a chick has hatched, and fly them to a location far from the nest, where they are left. Since this behavior required expending energy and time that could have been spent feeding and protecting the chicks, Tinbergen wanted to know why the birds did this.    Experiment: Tinbergen and his co-workers collected gull eggs and painted 69 of them white and left 68 of them with their natural color. (Statistically, these numbers are close enough to be considered equal.) The researchers then scattered the eggs next to a gull breeding area and observed from a nearby blind. Predation rates were recorded for white versus natural colored eggs.      Do the results of Tinbergen’s study support the hypothesis? 

GELO #6 – Question 2  Susie works for a lab company that dev…

GELO #6 – Question 2  Susie works for a lab company that develops many different pharmaceutical products. Her research division has stumbled across a new drug that they believe cures male pattern baldness. Before they can start selling the drug, they must demonstrate to the U.S. Food and Drug Administration that the drug is effective.  The company puts Susie in charge of this research project.   Susie randomly selects two groups of men to participate in the study: Group A and Group B.     Group A is administered the drug in pill form once a day for six months. Group B is given a pill that contains only inert ingredients once a day for six months.   All of the men will have the number of hairs per square inch of scalp measured in the clinic once per week.   Identify the experimental group in Susie’s study (Group A or Group B).