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Zorluk: OrtaAdaptive Radiation and Mechanisms of Speciation

A single founder species of finch colonizes a newly formed archipelago offering several unoccupied ecological niches, including hard seeds, nectar sources, and wood-boring insects. Over generations, this ancestral lineage gives rise to multiple distinct species, each possessing specialized beak morphologies adapted to a specific food source. Which evolutionary phenomenon is best illustrated by this rapid diversification?

  1. A
    Convergent evolution
  2. Adaptive radiationCevap
  3. C
    Inheritance of acquired traits
  4. D
    Cryptic coloration

Cevap

Adaptive radiation
Adaptive radiation describes the process where a single ancestral species rapidly evolves into a variety of forms that occupy different ecological niches. The classic example is Darwin's finches on the Galapagos Islands, where different beak shapes evolved to exploit diverse food resources.

Adım Adım Çözüm

1
Analyze the scenario details
A single ancestral species colonizes an isolated habitat and splits into multiple specialized species.
Identifying whether the process involves one lineage diverging or multiple unrelated lineages converging is essential.
2
Evaluate ecological conditions
The availability of diverse, unoccupied ecological niches drives morphological adaptation (such as specialized beaks).
Ecological opportunity is the primary trigger for rapid speciation from a common ancestor.
3
Match with evolutionary mechanisms
The diversification of one species into many niche-adapted species is defined as adaptive radiation.
Adaptive radiation specifically accounts for ancestral divergence across available ecological roles.

Anahtar Kavram

Adaptive Radiation
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Adaptive Radiation and Mechanisms of Speciation

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