The formation of new species over a few generations
Explanation:
Instantaneous speciation is the sudden evolution of new species that is reproductively isolated from it's parent and it is capable of reproducing and establish a new population of species. It is a common type of sympatric speciation that result from polyploidy. It lead to formation of new species over one generation.
The half-life of a radioisotope is the amon the symbol 42He, the subscript 2 is the mass number for helium and the superscript 4 is the atomic number for helium.
