The one factor that a scientist changes in an experiment is called the O
A responding variable.
O
B. hypothesis.
C. controlled variable.
D. manipulated variable.

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?