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THE EARLY PERIOD
D After Darw1n
THE SPECULATIVE PERIOD UP
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according acquired characters actual adaptation affinity allelomorphs amphidiploids animals Aristotle Aristotle's become biologists biology body called cause cells Charles Darwin chromosomes classification colour conception considered creation Cuvier cytological Darwin Darwinian definite Drosophila Drosophila melanogaster effect Empedocles environment Erasmus Darwin evidence evolution of species evolutionary evolutionist existence experimental experiments fact factors female gametes gene mutations genera genetic germ plasm give groups Hence heredity Heslop Harrison homology hybrid idea of evolution immutable important inheritance of acquired insects Kant Lamarck Lamarckian later lethal living things male matter means meiosis melanism Mendel Mendelian microevolution Mivart modern modification natural selection naturalists normal occurred organic evolution Origin of Species orthogenesis oviparous pair parent perfect period philosophical plants polyploid possess principle produced races recessive recognised says scientific speculative structure T. H. Huxley theory of evolution variations views viviparous Weismann writings