Adaptive radiation can be considered a macroevolutionary process. Which of the following provides the MOST direct evidence for adaptive radiation in the fossil record?
A gradual, linear progression of changes in a single lineage over a long period.
The discovery of transitional fossils showing intermediate forms between ancestral and descendant species.
A sudden appearance of many related species in a relatively short geological timeframe, often correlated with a new environment or resource.
The presence of homologous structures in distantly related organisms.
Related Questions
Adaptive radiation is often observed in situations where:
The environment remains stable for long periods
Strong competition exists within a well-established ecosystem
A new ecological opportunity arises, such as colonization of a new island
Species are highly specialized to a particular niche
