How many species of finches are found among the different Galápagos Islands, illustrating adaptive radiation?

• A. 8
• B. 5
• C. 20
• D. 13

Answer: (D)

Verified step by step guidance

1. Understand the concept of adaptive radiation: Adaptive radiation is an evolutionary process where organisms diversify rapidly 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.
2. Recognize the significance of the Galápagos Islands: The Galápagos Islands are a prime example of adaptive radiation, especially with the finches, which have evolved to fill different ecological niches across the islands.
3. Identify the finches as a classic example: The finches on the Galápagos Islands are often referred to as 'Darwin's finches' and are a classic example of adaptive radiation due to their varied beak shapes and sizes adapted to different feeding strategies.
4. Determine the number of finch species: The problem states that there are 13 species of finches found among the Galápagos Islands, illustrating the concept of adaptive radiation.
5. Reflect on the evolutionary significance: The diversity of finch species on the Galápagos Islands highlights how species can evolve different traits to adapt to specific environmental conditions, demonstrating the power of natural selection and adaptive radiation.