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DETERMINANTS OF EVOLUTION
MICROEVOLUTION MACROEVOLUTION AND MEGAEVOLUTION
LOWRATE AND HIGHRATE LINES
5 other sections not shown
adaptive zone ancestral animals Apatemyidae appear arise average become extinct bradytelic breeding carnivores characters condylarth continuous correlated differentiation discontinuous distinction distribution ecological environment Eocene Equidae Equus essential evidence evolutionary rates evolving example fact factors fauna gene genera genetic genotype genus groups horotelic horses Hypohippus hypsodonty Hyracotherium inadaptive increase individuals inference instance involved known large populations length less levels linear lines machairodontine mammals Merychippus Mesohippus Miocene mode of evolution momentum effect morphological mutation rates natural selection Neohipparion occur Oligocene optimum organism orthogenesis Paleocene paleontological paleontologists pattern peak pelecypods perissodactyls phenomena phenotypic phyla phyletic evolution phylogeny phylum Pliocene possible postulate preadaptation probably prospective functions quantum evolution random rapid rates of evolution rectilinear relatively relicts saltation selection pressure selective value sequence shift small populations sort speciation species structural survival survivorship tachytelic taxonomic tend theory tion transitional trends Triassic types typical usually variability variation