Sulfolobus Species Are Found at the Surface of Acidic Sulfur-Containing

Multiple Choice

Sulfolobus species are found at the surface of acidic sulfur-containing hot springs such as many of those found in Yellowstone National Park. They only grow at temperatures above 50°C and at a pH between 1 and 6. How would you classify these organisms?

A) Anaerobic, acidophilic mesophiles
B) Aerobic, acidophilic thermophiles
C) Microaerophilic, halotolerant basophiles
D) Aerobic, psychrophilic acidophiles
E) Psychrotrophic neutrophiles