Darwin's finches are good example of:

Question

Accepted Answer

The correct option is 2: Adaptive radiation.

Darwin's finches are a classic and powerful example of adaptive radiation. Adaptive radiation is an evolutionary process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, creates new challenges, or opens new environmental niches. In the case of Darwin's finches on the Galápagos Islands, a single ancestral species arrived and, over time, diversified into numerous species, each adapted to different food sources and habitats. This diversification is most strikingly seen in their beak shapes, which evolved to exploit specific diets, such as crushing seeds, catching insects, or even using tools. This process showcases how natural selection drives the evolution of diverse forms from a common ancestor to fill available ecological roles.

The incorrect option is 1: Connecting link.
A connecting link refers to an organism that possesses characteristics of two different groups of organisms, suggesting an evolutionary relationship between them. While evolution is at play, Darwin's finches represent diversification within a single lineage rather than a link between two distinct groups.

The incorrect option is 3: Convergent evolution.
Convergent evolution occurs when unrelated species independently evolve similar traits as a result of having to adapt to similar environments or ecological niches. In contrast, Darwin's finches all descended from a common ancestor and diversified, which is the opposite of convergent evolution where different lineages become more similar.

The incorrect option is 4: Industrial melanism.
Industrial melanism is a phenomenon where darker individuals within a species become more prevalent in polluted industrial areas due to natural selection, as seen in the peppered moth. This is a specific instance of adaptation to environmental changes, but it does not describe the broad diversification of an ancestral species into multiple forms, as observed with Darwin's finches.