Draw a cross section of the mammalian spinal cord, including the dorsal and ventral roots, and draw a muscle to one side on the spinal cord. Draw in a reflex that includes a sensory nerve, an interneuron, and a motor nerve.

The dependent variable in this experiment is C: timing of the cricket’s chirps.

Explanation:

The independent variable can show different values that do not depend on another variable. Instead, they directly affect the values of the dependents ones.

During an investigation, a researcher can study, under controlled conditions, how one of the variables influences the other one. The independent variable can be manipulated by the researcher, while the dependent one can not. A hypothesis is a claim of how it works this relation.

In the example, the relation is given by how temperature affects the timing of a cricket’s chirps. So "temperature" is the independent variable and "timing of a cricket´s chirp" the dependent one. Controlled conditions are the size of the box and the temperature degrees in the box. The volume of the cricket’s chirps could be a dependent variable but it was not measured in this experiment.