The Irish elk was a prime example of orthogenesis because it had evolved from a smaller ancestor with smaller antlers.
22.
Orthogenesis was popular among some paleontologists, who believed that the fossil record showed a gradual and constant unidirectional change.
23.
Baer was also a believer in a teleological force in nature which has been compared to a form of evolutionary orthogenesis.
24.
Much like Othenio Abel, Hennig was a supporter of orthogenesis theories of evolution as was his assistant, Karl Beurlen.
25.
American paleontologist George Gaylord Simpson ( 1953 ) in an attack on orthogenesis described it as " the mysterious inner force ".
26.
In 1930, the American zoologist Austin Hobart Clark attempted to modify orthogenesis with his theory of " zoogenesis ".
27.
Orthogenesis was particularly popular among some paleontologists, who believed that the fossil record showed patterns of gradual and constant unidirectional change.
28.
Other examples of orthogenesis include saber tooth tigers teeth growing to unbearable sizes or oysters coiling their valves into itself until it suffocated.
29.
Classic proponents of orthogenesis rejected the theory of natural selection as the organizing mechanism in evolution for a rectilinear model of directed evolution.
30.
Stephen Jay Gould wrote that Whitman did not believe in Lamarckism, Darwinism or mutationism, instead Whitman was an advocate of orthogenesis.
