A researchers is testing the effect of a high fat diet on coat thickness in hams
ID: 47872 • Letter: A
Question
A researchers is testing the effect of a high fat diet on coat thickness in hamsters. She feeds 20 hamsters a high fat diet, and 20 a normal diet for three weeks. She then measures the thickness of individual hairs on the dorsal surface of the hamster. What is the control for this experiment? (EXPLAIN)
The amount of fat in the diet
The thickness of individual hairs
The 20 hamsters fed the high fat diet
The 20 hamsters fed the normal diet
Three weeks
A.The amount of fat in the diet
B.The thickness of individual hairs
C.The 20 hamsters fed the high fat diet
D.The 20 hamsters fed the normal diet
E.Three weeks
Explanation / Answer
D. The 20 hamsters fed the normal diet
This is because, we are not performing any experiment on these 20 hamsters. They act as standards with whom we would be comparing the results of fat diet done on other 20 hamsters. We use them as a standard for comparison with the results.
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