GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The organisms on the Galápagos Islands were virtually identical to mainland organisms.
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A small number of different plant and animal species had come to the mainland from the Galápagos Islands.
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The organisms on the Galápagos Islands were completely unrelated to mainland organisms.
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A small number of different plant and animal species had come to the Galápagos Islands from the mainland.
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Detailed explanation-1: -What did Darwin infer from his observations of organisms in South America and the Galapgos Islands? A small number of different plant and animal species had come to the Galapagos Islands from the mainland. only traits that are controlled by genes can be acted on by natural selection.
Detailed explanation-2: -One key observation Darwin made occurred while he was studying the specimens from the Galapagos Islands. He noticed the finches on the island were similar to the finches from the mainland, but each showed certain characteristics that helped them to gather food more easily in their specific habitat.
Detailed explanation-3: -The Galápagos Islands Some are rocky and dry. Others have better soil and more rainfall. 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.
Detailed explanation-4: -In this island Darwin noticed that most species were similar but different from other in the other islands, giving enough evidence to theorize that species change and this is related to their feeding and surroundings. He collected finches that helped him to understand this resolution.
Detailed explanation-5: -In South America, Darwin found fossils of extinct animals that were similar to modern species. Furthermore, on the Galapagos Islands he noticed many variations of plants and animals that were similar to those he found in South America, suggesting that species adapted over time and to their environment.