How do darwin' s finches illustrate adaptive radiation ?

Explanation

**Step-by-Step Solution:**

1. **Introduction to Darwin's Finches:**
- Darwin's finches are a group of bird species found on the Galápagos Islands. They are a classic example of adaptive radiation, which is the process by which organisms diversify rapidly from an ancestral species into a wide variety of forms to adapt to different environments.

2. **Observation of Variability:**
- Charles Darwin observed that there were many varieties of finches on the same island. Each species had distinct physical characteristics, particularly in their beak shapes and sizes, which were adaptations to their specific feeding habits.

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