<prompt> Bacteria that grow optimally between 25-40degC are called?MesophilesPsychrophilesThermophilesCryophiles  <response>: Mesophilic: Bacteria which grow best at temperatures of 25-40degC are called mesophilic. In this group some bacteria like pseudomonas aeruginosa have a wider range 5-43degC. While others like the gonococcus have a restricted range 30-39degC Psychrophilic bacteria: are bacteria that grow best at temperature below 20 C. Some of them growing at temperature as low as - 7degC. They are soil and water saprophytes. Thermophiles: grow best at high temperatures 55-80degC. They may cause spoilage of under processed canned food. Some thermophiles like Bacillus stearothermophilus form spores that are exceptionally thermoresistant. 