To find out which ingredient the cockroaches are refusing, you can carry out a controlled experiment. Hydramethylnon is dissolved in oleic acid before being mixed with corn syrup to prepare the poisoned bait, so you should test all three ingredients.
Suppose you conducted a feeding trial to test each ingredient. In the trial, a set of four agar dishes, three containing all except one ingredient and one with all three ingredients (the control), were weighed and placed 3 cm apart on the kitchen floor in an infested apartment. After two days, the dishes were weighed again to measure food consumption. You then repeated the trial 4 times and averaged the results.
Based on the results of the feeding experiment, what conclusions can you draw? Select all that apply.
a. Roaches ate about the same amount from the dish with no hydramethylnon as they did from the control dish.
b. Roaches ate about the same amount from the dish with no oleic acid as they did from the control dish.
c. Roaches ate about the same amount from the dish with no corn syrup as they did from the control dish.
d. Roaches are refusing hydramethylnon.
e. Roaches are refusing oleic acid.
f. Roaches are refusing corn syrup.