Darwin's finches — adaptive radiationडार्विन की फिंच — अनुकूली विकिरण

NCERT Fig 6.5 · Class 12 Biology · Chapter 6 · interactive diagram

Parts and their functions

• Ancestral seed-eating finch (पूर्वज बीज खाने वाली फिंच) — The original finches on the island ate seeds. All other kinds evolved from this stock on the island itself.
• Seed-eating finch (large beak) (बीज खाने वाली फिंच (बड़ी चोंच)) — Kept the seed-eating habit; a strong, deep beak cracks seeds.
• Insectivorous finch (कीटभक्षी फिंच) — Beak became thin and pointed — good for picking insects.
• Vegetarian finch (शाकाहारी फिंच) — Beak became stout and curved — good for buds and fruits.

Steps

1. 1 · One ancestral seed-eating finch reached the island.
2. 2 · Its descendants radiated into different habitats; beaks changed with food → many kinds of finches.

Original diagram drawn by Simple Learning Hub, based on NCERT Fig 6.5. Report a mistake