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he medium ground finch (Geospiza fortis), a seed-eating bird that inhabits the Galápagos Islands. In 977, the G. fortis population on the island of Daphne Major was decimated by a long period of drought Of some 1,200 birds, only 180 survived. During the drought, small, soft seeds were in short supply. The nches mostly fed on large, hard seeds that were more plentiful. Birds with larger, deeper beaks were etter able to crack and eat these larger seeds, and they survived at a higher rate than did finches with maller beaks. Since beak depth is an inherited trait in these birds, the offspring of surviving birds also ended to have deep beaks. As a result, the average beak depth in the next generation of G. fortis was greater than it had been in the pre-drought population. his is an example of which evolutionary mechanism? üffen birini seçin: 5 a. gene flow O þ. natural selection

he medium ground finch (Geospiza fortis), a seed-eating bird that inhabits the Galápagos Islands. In 977, the G. fortis population on the island of Daphne Major was decimated by a long period of drought Of some 1,200 birds, only 180 survived. During the drought, small, soft seeds were in short supply. The nches mostly fed on large, hard seeds that were more plentiful. Birds with larger, deeper beaks were etter able to crack and eat these larger seeds, and they survived at a higher rate than did finches with maller beaks. Since beak depth is an inherited trait in these birds, the offspring of surviving birds also ended to have deep beaks. As a result, the average beak depth in the next generation of G. fortis was greater than it had been in the pre-drought population. his is an example of which evolutionary mechanism? üffen birini seçin: 5 a. gene flow O þ. natural selection

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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The medium ground finch (Geospiza fortis), a seed-eating bird that inhabits the Galápagos Islands. In 1977, the G. fortis population on the island of Daphne Major was decimated by a long period of drought: Of some 1,200 birds, only 180 survived. During the drought, small, soft seeds were in short supply. The finches mostly fed on large, hard seeds that were more plentiful. Birds with larger, deeper beaks were better able to crack and eat these larger seeds, and they survived at a higher rate than did finches with smaller beaks. Since beak depth is an inherited trait in these birds, the offspring of surviving birds also tended to have deep beaks. As a result, the average beak depth in the next generation of G. fortis was greater than it had been in the pre-drought population. This is an example of which evolutionary mechanism? Lütfen birini seçin: O a. gene flow O b. natural selection O c. random mating O d. mutation O e. genetic drift
Transcribed Image Text:The medium ground finch (Geospiza fortis), a seed-eating bird that inhabits the Galápagos Islands. In 1977, the G. fortis population on the island of Daphne Major was decimated by a long period of drought: Of some 1,200 birds, only 180 survived. During the drought, small, soft seeds were in short supply. The finches mostly fed on large, hard seeds that were more plentiful. Birds with larger, deeper beaks were better able to crack and eat these larger seeds, and they survived at a higher rate than did finches with smaller beaks. Since beak depth is an inherited trait in these birds, the offspring of surviving birds also tended to have deep beaks. As a result, the average beak depth in the next generation of G. fortis was greater than it had been in the pre-drought population. This is an example of which evolutionary mechanism? Lütfen birini seçin: O a. gene flow O b. natural selection O c. random mating O d. mutation O e. genetic drift
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