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48. During the late Cretaceous Period, the quadrupedal dinosaur Triceratops horridus (fossils dating from 68.0 to 67.0 MYA in Wyoming's Lance Creek Formation) evolved into the heavier Triceratops prorsus (fossils dating from 67.0 to 66.0 MYA in Montana’s Hell Creek Formation), with no apparent branching of additional species in this lineage. The gradual disappearance of one light ancestral species (Triceratops horridus), and its gradual replacement by one heavier descendant species (Triceratops prorsus), perhaps in response to the newly-arrived predatory dinosaur Tyrannosaurus rex, in about the same geographic region, is probably an example of: A. disruptive selection leading to branching speciation B. diversifying selection leading to cladogenesis C. directional selection leading to anagenesis D. stabilizing selection leading to stasis E. all of the above

48. During the late Cretaceous Period, the quadrupedal dinosaur Triceratops horridus (fossils dating from 68.0 to 67.0 MYA in Wyoming's Lance Creek Formation) evolved into the heavier Triceratops prorsus (fossils dating from 67.0 to 66.0 MYA in Montana’s Hell Creek Formation), with no apparent branching of additional species in this lineage. The gradual disappearance of one light ancestral species (Triceratops horridus), and its gradual replacement by one heavier descendant species (Triceratops prorsus), perhaps in response to the newly-arrived predatory dinosaur Tyrannosaurus rex, in about the same geographic region, is probably an example of: A. disruptive selection leading to branching speciation B. diversifying selection leading to cladogenesis C. directional selection leading to anagenesis D. stabilizing selection leading to stasis E. all of the above

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
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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48. During the late Cretaceous Period, the quadrupedal dinosaur Triceratops horridus (fossils dating from 68.0 to 67.0 MYA in Wyoming's Lance Creek Formation) evolved into the heavier Triceratops prorsus (fossils dating from 67.0 to 66.0 MYA in Montana's Hell Creek Formation), with no apparent branching of additional species in this lineage. The gradual disappearance of one light ancestral species (Triceratops horridus), and its gradual replacement by one heavier descendant species (Triceratops prorsus), perhaps in response to the newly-arrived predatory dinosaur Tyrannosaurus rex, in about the same geographic region, is probably an example of: A. disruptive selection leading to branching speciation B. diversifying selection leading to cladogenesis C. directional selection leading to anagenesis D. stabilizing selection leading to stasis E. all of the above
Transcribed Image Text:48. During the late Cretaceous Period, the quadrupedal dinosaur Triceratops horridus (fossils dating from 68.0 to 67.0 MYA in Wyoming's Lance Creek Formation) evolved into the heavier Triceratops prorsus (fossils dating from 67.0 to 66.0 MYA in Montana's Hell Creek Formation), with no apparent branching of additional species in this lineage. The gradual disappearance of one light ancestral species (Triceratops horridus), and its gradual replacement by one heavier descendant species (Triceratops prorsus), perhaps in response to the newly-arrived predatory dinosaur Tyrannosaurus rex, in about the same geographic region, is probably an example of: A. disruptive selection leading to branching speciation B. diversifying selection leading to cladogenesis C. directional selection leading to anagenesis D. stabilizing selection leading to stasis E. all of the above
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