OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There were different types of predators on the island.
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There were different types of food available on the island.
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The finches had no water to drink.
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The finches on the mainland could not fly high enough.
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Detailed explanation-1: -What most likely caused the finches on the Galapagos Islands to have beaks that were differnt from the finches living on the South American mainland? They were different types of food available on the island.
Detailed explanation-2: -On the Galápagos, finches evolved based on different food sources-long, pointed beaks served well for snatching insects while broad, blunt beaks work best for cracking seeds and nuts.
Detailed explanation-3: -1: Finches of Daphne Major: A drought on the Galápagos island of Daphne Major in 1977 reduced the number of small seeds available to finches, causing many of the small-beaked finches to die. This caused an increase in the finches’ average beak size between 1976 and 1978.
Detailed explanation-4: -Darwin’s finches were different on each island because of natural selection. The foods, predators, and living conditions were different on each island. This caused the finches to adapt to their conditions over the course of many generations..
Detailed explanation-5: -These birds, although nearly identical in all other ways to mainland finches, had different beaks. Their beaks had adapted to the type of food they ate in order to fill different niches on the Galapagos Islands. Their isolation on the islands over long periods of time made them undergo speciation.