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Answer :
Answer:
Adaptive radiation .
Explanation:
All other finches species are evolved from original seed eating finches.
Plants produce hard seeds in dry season and soft in cold season.. Due to this finches beak get affected
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Final answer:
The development of different beak sizes and shapes among Galápagos finches resulted from natural selection, where environmental pressures like food availability led to adaptations that specialize the finches in different ecological niches.
Explanation:
The differences in the development of the beaks of the Galápagos finches can be attributed to the process of evolution by natural selection. During a severe drought, finches with larger beaks that could crack hard seeds survived and reproduced, leading to offspring with similarly large beaks. This demonstrates how adaptation to environmental conditions led to the evolution of different beak sizes and shapes.
Darwin's observations during his journey in the 1830s also supported the idea that the finches' varied beaks were a result of adaptive changes to equip the birds to access different food sources. The different beak structures facilitated specialization in different niches, preventing competition for the same food resources. In this way, a single ancestral species of finch from the mainland gave rise to many different species on the islands, each with its distinct beak structure and diet.
