scientist performed an experiment to determine whether ther is a connection between learning and the ability and food.the group that had been fed had retained this ability but the other had not.the probable reason that the scientist used only mice from the same pure bred stain is so that:
a)generic diffrences would not affect the outcome of the test
b)the experiment would not cost as much
c)the mice would be all the same color
d)the mice would be all the same size
e)the experment could be repeated with the same mice
I believe a) should be "genetic" not "generic."
What do you think is the best answer?
Please read my comments to your next question.
the answer shuold be a?
The probable reason that the scientist used only mice from the same purebred strain is option (a) - generic differences would not affect the outcome of the test.
By using mice from the same purebred strain, the scientist eliminates the influence of genetic variations on the test results. This ensures that any differences observed in learning ability between the fed and non-fed groups are more likely to be attributed to the food provided, rather than genetic factors.
If the mice used in the experiment were from different strains, there could be inherent genetic differences that might impact their learning abilities. This could introduce confounding variables that would make it difficult to attribute the observed results solely to the effect of feeding.
It is important in scientific experiments to control for as many variables as possible in order to accurately determine cause and effect relationships. By using mice from the same purebred strain, the scientist ensures that any differences observed in learning ability are more likely to be influenced by the food provided and not by genetic factors.