Pablo and Johanna have to do a yearlong study for their biology course. After some discussion, they decide to try comparing their dogs and the diet that they feed them to test
their hypothesis that the local veterinarian's special dog food mix will enhance growth and
development. Each student adopts a puppy from the local pound. Pablo plans to feed his
goldendoodle the special diet, while Johanna plans to use generic dry kibble from the
supermarket for her bulldog.
The independent variable in this study will be .
a. the age of the dogs
b. the sex of the dogs
c. the type of food the dogs receive
d. breed of dogs
9. One dependent variable in this study will be .
a. the age of the dogs
b. the type of food the dogs receive
c. how much the dogs grow
d. breed of dogs
10. Pablo and Johanna have too many .
a. variables that they didn't control and not enough replicates
b. replicates and not enough variables
c. controlled variables and not enough uncontrolled variables
d. independent variables and not enough dependent variables