The ancestor of tigers and snow leopards also branched off around 3.9 million years ago. The tiger then began to evolve into a unique species toward the end of the Pliocene epoch, about 3.2 million years ago.That makes the tiger and snow leopard âsister speciesâ, the researchers report in the journal Molecular Phylogenetics and Evolution.he ancestor of tigers and snow leopards also branched off around 3.9 million years ago. The tiger then began to evolve into a unique species toward the end of the Pliocene epoch, about 3.2 million years ago.
4. isolation - (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it. psychiatry, psychological medicine, psychopathology-the branch of medicine dealing with the diagnosis and treatment of mental disorders.. isolation - (psychiatry) a defense mechanism in which memory of an unacceptable act or impulse is separated from the emotion originally associated with it. psychiatry, psychological medicine, psychopathology-the branch of medicine dealing with the diagnosis and treatment of mental disorders.
Remote: describes a geographical area where a community is located over 350 km from the nearest service centre having year-round road access. Isolated, by the Canadian government definition, means a geographical area that has scheduled flights and good telephone services, but is without year-round road access. Note that not all homes in a community have phones, and that flights may be cancelled or delayed due to weather.