Which of the following best describes physiological variation in biology?
Variations in the physiological processes and functions of organisms
Differences in physical characteristics and appearance within a population
Differences in behavior and social interactions among individuals
Variations in the genetic makeup of individuals within a species
Correct answer is A
Physiological variation in biology refers to the variations in the physiological processes and functions of organisms. Physiological variation encompasses the variations in the internal processes and functions of organisms, including metabolic processes, hormone regulation, immune responses, cellular functions, and physiological adaptations.