Question

Why did Darwin’s observations of Galápagos tortoises cause him to wonder how species originate?

Answer 1

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Individual Galapagos islands differ from one another in important ways. Some are rocky and dry.Darwin noticed that the plants and animals on the different islands also differed. For example, the giant tortoises on one island had saddle-shaped shells, while those on another island had dome-shaped shells. People who lived on the islands could even tell the island a turtle came from by its shell. This started Darwin thinking about the origin of species. He wondered how each island came to have its own type of tortoise.

This link might help you out: http://www.ck12.org/user%3A2210test/book/CK-12-Biology-Concepts/r2/section/3.12/Evolution-%253A%253Aof%253A%253A-CK-12-Biology-Concepts/

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