In organisms living in hot water springs, the ambient temperature...

Temperature is a crucial environmental factor that significantly influences the physiological functions of organisms. It directly affects the kinetics of enzymes, which in turn regulates the basal metabolism and overall cellular activities of the organism. Organisms living in extreme environments, such as hot water springs, have evolved specialized enzymes that remain stable and functional at high temperatures, allowing their cell metabolism to proceed efficiently under such conditions.

Answer: affects the enzyme kinetics of their cell metabolism.