Question

what is the difference between evolution and speciation???

Answer 1

Formation of new species because of genetic drift, barriers and natural selection takes place which leads to complex structures with better survival advantages. this is called evolution
while,speciation is the process by which new species develop from the existing species .
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Answer 2

Speciation is just one of the small process in the various grand scheme of Evolution. Speciation makes one group of organism because of selection and geographical conditions (isolations) can make it reproduce inviable offsprings with the parent species, thus making them a separate species.