Psychrophiles grow best at low temperatures whereas psychotrophs (a mesophile) are capable of growth at lower temperatures (even though this is below their temperature range). Psychotrophs can cause food spoilage as well. What is the main difference between psychrophiles and psychotrophs?
1) Psychrophiles can grow at even lower temperatures than psychotrophs
2) Psychotrophs can grow at higher temperatures than psychrophiles
3) Psychrophiles and psychotrophs have the same temperature range
4) Psychotrophs cannot cause food spoilage