Final answer:
Bacteria thriving at 175°F are most likely thermophiles, adapted to high temperatures. Thermophiles grow optimally between 50°C and 80°C, unlike psychrophiles which prefer cold environments, or mesophiles that grow at moderate temperatures.
Step-by-step explanation:
Bacteria thriving in water temperatures of 175 degrees Fahrenheit (79.44 degrees Celsius) are most likely members of the category of thermophiles. These microorganisms are adapted to life at high temperatures, typically ranging from 50°C to 80°C. Thermus aquaticus is an example of a thermophile that is known for its use in developing the polymerase chain reaction technology. On the other hand, psychrophiles are microorganisms that grow best at cold temperatures, generally with an optimum growth temperature of about 15°C and are commonly found the environment such as in Antarctic lakes like Lake Whillans. Mesophiles prefer moderate temperatures, typically between 20°C and 45°C, and pathogens are often mesophiles. Hyperthermophiles are extreme examples of thermophiles that grow optimally at temperatures above 80°C, such as those found near underwater volcanoes and thermal ocean vents.