An experiment is performed to determine if eating breakfast affects students' performance on exams. The experimental (independent) variable is
A. the students' scores on the exams.
B. the ages of the students.
C. whether or not the students eat breakfast.
D. whether or not the students drink coffee.

The experimental (independent) variable is whether or not the students eat breakfast (Option C).

In conclusion, the experimental (independent) variable is whether or not the students eat breakfast (Option C).

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I did not understand what the exact question was, but according to my understanding, I think it is (A)

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.