That depends on what you mean by 'immediate'. Drastic rates of evolution are possible in many species, where mutations are either relatively very common or where the environment results in harsh selection.
But nothing will make one species "immediately" evolve into another in one generation, or even two or ten.
A Lamarck's model
development of polyploidy
They are involved with the creation of a new copy of an animal (plant). Thus, reproductive organs are involved with the reproduction of the species.
Mutation, isolation and natural selection. Google allopatric speciation.
This process clearly does not result in new organisms and hence not reproduction. Which clearly says that autotomy is not considered reproduction. In some cases, autotomy is not considered as a type of reproduction. It is also not classified as reproduction because this process does not result in new organisms such as new lizards and stuff. Like regeneration. Regeneration is considered as reproduction because reproduction result in formation of new species.
Long term isolation can cause new species to form if the isolation has been over a very long time.
This may result in an adaptation due to their being either a positive or negative mutation within the species. i.e a fish is born with night-vision on a random occasion; this fish has a better chance of breeding with another and eventually affects the entire species. The fish move to larger bodies of water where they can hunt safely at night rather than in daylight. This can result in an entirely new night vision bred fish, where they will most certainly push other species out of the metaphorical fish pond.
AnswerThe creation of a new species is the evolution of a new species. The process by which new species arise is called speciation.
In the process of natural selection, adaptation leads to the creation of new species.
macroevolution
macroevolution
speciation
Extinction
Speciation is the best term to describe a new species developing from an existing one.
speciation
a new species might form when a group of individuals remains sparated from the rest of its species long enough to accumulate different traits
Saltationism. Called the " hopeful monster " theory. Long refuted. Mutation is the grist to the mill of natural selection but in and of itself will not result in new species.
They are involved with the creation of a new copy of an animal (plant). Thus, reproductive organs are involved with the reproduction of the species.
Alopatric speciation.