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Stockards bulldogbassethound cross
S1r Gav1n de Beer F R S Director British Museum
Donald G MacRae Reader in Sociology University
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adaptive anatomical ancestor animals and plants anthropoid apes antigens appear atoll behaviour biological progress biologists body bones breed cells century characters chromosomes Cirripedia classification coral reefs cytoplasm Darwin Darwinian descendants Dollo's Law Drosophila effect eggs embryology embryonic development embryos emotion environment environmental ethical evidence evolution evolutionary evolved example experiments extinct fact favourable female fertile formation forms fossil record function gastrula genera genes genetical genus geological groups heredity hominid human hybrids hypothesis important inbred males individual inheritance insects larva later living lower macronucleus mammals mate mechanisms Mendelian modern mutation natural selection nuclei nutrition occur offspring organisms origin Origin of Species paedomorphosis palaeontologists pangenesis pattern period phylogenetic pigs populations possible present primitive principle problem produce races reproductive isolation resemblance result sexual reproduction sexual selection similar social species structure systematic systematists T. H. Huxley theory tion tissues variation variety vertebrates