These results indicate that the rats exhibited hyperalgesia, allodynia, and dysesthesia.

The bush rat exhibits sexual dimorphism; the males are larger than the females in the species.

Under stress, male rats exhibit deleterious effects on spatial memory, however female rats show a degree of resistance to this phenomenon.

Despite its name, the black rat exhibits several colour forms.

Like most animals, rats exhibit fear, an emotion that may help creatures escape from predators.

Tolman showed in his study that the rats exhibited a capability of latent learning.

Other rats, handled similarly but given no comparable education, exhibit no such neuro-anatomical novelties.

These rats preferred drinking alcohol over other liquids, resulting in a tolerance for alcohol and exhibited a physical dependency on alcohol.

These male rats also exhibited bisexual behavior.