→ Human evolution can be referred to as adaptive radiation because adaptive radiation is an evolutionary process which gives rise to new species from a single common ancestor.
→ But in the case of human evolution, although we share a common ancestor, we humans have undergone an eventual but progressive alteration in the eating preferences, structure of body etc.
→ The evolution of humans does not include diversification and radiating into different species, which in fact, is a distinguishing feature of adaptive radiation.