Which microorganisms are classified as thermophilic?

Thermophilic microorganisms thrive at elevated temperatures, typically between 45°C and 80°C (113°F and 176°F). The correct choice lists Bacillus stearothermophilus and Bacillus coagulans, both of which are known to be thermophiles. Bacillus stearothermophilus, in particular, is often used as a biological indicator in sterilization processes due to its ability to survive high temperatures, making it an important organism in fields such as food safety and microbiology.

Bacillus coagulans is also recognized for its ability to grow at high temperatures and is commonly found in fermented foods and probiotics. The thermophilic nature of these organisms plays a crucial role in various industrial applications, including the production of certain enzymes and in composting processes.

The other choices contain microorganisms that are not classified as thermophiles. For instance, Saccharomyces cerevisiae and Candida albicans are more commonly associated with mesophilic conditions, thriving at moderate temperatures. Similarly, Escherichia coli is a mesophilic bacterium, and while Lactobacilli can also include some thermophilic species, they are not exclusively thermophiles. The remaining pair, Aeromonas hydroph