Suppose that an island is colonized by a group of finches of a certain species that came over from the mainland. The island has two food sources: large seeds and small seeds. Finches who have large beaks can eat the large seeds well, and finches that have small beaks can eat the small seeds well. Finches with medium size beaks can't eat either one well. When the finches mate and reproduce, their offspring tend to have beaks of a size intermediate between their parents'. Which kind of selection is the finch species most likely to experience as a whole? Disruptive selection Stabilizing selection Directional selection
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This means that these two types of finches are well adapted to their environment and are likely to survive and reproduce. On the other hand, finches with medium size beaks can't eat either type of seed well. This means that they are not well adapted to their Show more…
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Madhur L.
On an island, finches that fed on large, hard seeds had large beaks. Finches with small beaks fed on small, soft seeds. A drought changed the vegetation on the island. After this period, the number of seeds declined. The decrease in small, soft seeds was greater than the decrease in large, hard seeds. What are two ways the decrease in seed availability will affect the population of birds on the island? The population of birds with large beaks will increase on the island. The population of birds with small beaks will increase on the island. The trait for large beaks will be passed on to future generations through natural selection. The trait for small beaks will be passed on to future generations through natural selection. The population of birds with large beaks and birds with small beaks will be equal on the island.
James K.
Size: The Galapagos Islands are home to a variety of finch species that have adapted to different conditions. One of the main factors driving the evolution of these finches is the availability of food sources, particularly seeds. The size and shape of their beaks vary depending on the type of seeds they consume. This variation in beak size allows for competition between finch populations, with smaller beaks competing for smaller seeds and larger beaks competing for larger seeds.
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