Extinction is the complete disappearance of a species from life. No more of that species is alive on the planet. It happens all the time; the normal rate of extinctions is called the background extinction rate.
Mass extinction is when a group of extinctions significantly above the background rate occurs within a short space of time. The deifnition of 'significant' varies depending on the authority, and hence anywhere from five to over twenty mass extinctions have occurred on Earth in the known past - it is probable that more have happened, but this cannot be discerned from fossil and other records because of the size of the organisms involved.
540 million years ago was the first mass extinction
The most devastating mass extinction occurred in the Late Permian (~250 million years ago).
Extinction did.
It is the fate of most living things eventually to go extinct. standard commonplace rate of extinction not associated with a mass extinction.
Mass extinction isn't a natural role in any life-system. They happen as a consequence of some catatrosphic disaster or radical unbalance in the eco-system. As a result of mass extinctions other 'groups' evolve into species that take the place of those exterminated.
The effect of mass extinction is extinction, death of a mass
There were five major extinction events in the past. They are called the Cretaceous-Tertiary (or K-T) extinction event, the late Devonian mass extinction, the Permian mass extinction, the Ordovician-Silurian mass extinction and the Triassic-Jurassic mass extinction event.
the holocene extinction
The dinosaurs fell victim to a mass extinction.
This would be called a mass extinction or mass die off.This would be called a mass extinction.
540 million years ago was the first mass extinction
We are still not sure what caused the mass extinction of the dinosaurs, though an asteroid impact seems to be the popular theory.Scientists believe we may be heading towards another mass extinction event.
they r related by having the same family blood
Catastrophic extinction event.
Mass depletion is an event in which extinction rates are higher than normal but not high enough to be classified as a mass extinction.
Mass extinction is when many animals go extinct within a short period of time caused by the same variables/factors leading to the mass extinction.
The most devastating mass extinction occurred in the Late Permian (~250 million years ago).