Question

what is adaptive radiation?

• the event when a species no longer has living members
• changes in allele frequency that are always occurring in natural populations
• large-scale evolutionary patterns and trends in speciation
• a lineage undergoes a burst of genetic divergences that gives rise to many species

Explanation:

Define adaptive radiation

Adaptive radiation is an evolutionary process where a single ancestral lineage rapidly diversifies into many new species. This typically occurs when new ecological niches become available, such as after a mass extinction or upon colonizing a new environment.

Analyze the first option

"The event when a species no longer has living members" describes extinction, not adaptive radiation.

Analyze the second option

"Changes in allele frequency that are always occurring in natural populations" describes microevolutionary processes, such as genetic drift or natural selection, rather than the rapid macroevolutionary diversification of lineages.

Analyze the third option

"Large-scale evolutionary patterns and trends in speciation" is a broad definition of macroevolution, which encompasses adaptive radiation but is not its specific definition.

Analyze the fourth option

"A lineage undergoes a burst of genetic divergences that gives rise to many species" perfectly describes the rapid branching and speciation characteristic of adaptive radiation.

Answer:

• (A) The event when a species no longer has living members
• (B) Changes in allele frequency that are always occurring in natural populations
• (C) Large-scale evolutionary patterns and trends in speciation
• (D) A lineage undergoes a burst of genetic divergences that gives rise to many species (Correct answer)