Final answer:
The hooded rat is a specific strain of rat called the Long-Evans, known for its unique coat pattern. It is commonly used in scientific research.
Step-by-step explanation:
The rat stock known as the "hooded rat" is actually a specific strain of the rat species called the Long-Evans. These rats are characterized by their unique coat pattern, which includes a darker color on the back and a lighter color on their belly, giving them a hooded appearance. The Long-Evans rat strain is commonly used in scientific research, particularly in behavioral and neurological studies.