This causes pieces of the continental crust to crack and pull apart. Some slabs of the crust sink, causing a rift zone. If the lithosphere continues to spread, a narrow sea can form. Continued spreading produces an ocean basin and ridge system.
Confidence votes 3. a tiger is a mammal because they give milk to their young and produce milk. They breath the air form of oxygen and produce milk. They fulfil the criterion that need to be fulfilled by a mammal. Thse being that they are warm blooded, animals that give birth to live young and sucle them.
The massive paws, teeth, and rippling muscles of tigers scream king of the predators.. Tigers belong to the genus Panthera, or big cats. Other species in the genus are Leopards, African lions, Snow Leopards and Jaguars.Tigers, named Panthera tigris, include eight subspecies, distinguished by size, coloration, and geographic distribution. Three of these subspecies are extinct.They are the Caspian, Bali and Javan tigers. The five remaining subspecies are Bengal, Siberian, Sumatran, Indo-Chinese and, South China tigers.igers, named Panthera tigris, include eight subspecies, distinguished by size, coloration, and geographic distribution. Three of these subspecies are extinct. They are the Caspian, Bali and Javan tigers.