Question

What is the first step in the mechanism of adaptive radiation?

Options

• Members spread into different habitats or ecological niches

• A common ancestral species is present in a region

• Natural selection favours different useful variations in each group

• Distinct species form after populations diverge

Answer 1

According to the mechanisms of adaptive radiation, the first step is that a common ancestral species is present in a region. This is the starting point from which all subsequent evolutionary divergence occurs, followed by spreading into different habitats, exposure to different environmental pressures, natural selection, and eventual formation of distinct species.