Related by context. Frequent words. (Click for all words.) 52 morphologically 49 convergent evolution 49 tetrapod 49 diatom 48 species 48 celled 48 prokaryotes 47 placental mammals 47 single celled 47 multicellular organisms 46 amino acid sequences 46 taxonomic 45 sexual dimorphism 45 taxa 45 mammalian 45 vertebrate 45 phylogeny 45 single celled organism 45 theropod 45 faunal 44 phylum 44 taxon 44 tetrahedral 44 unicellular 44 feathered dinosaurs 43 Archaea 43 hybridize 43 phylogenetic 43 crocodilians 43 isotope ratios 43 angiosperms 43 tetrapods 42 organism 42 phyla 42 mitochondrial genome 42 Fig. 1A 42 cruciform 42 Drosophila melanogaster 42 multicellular 42 morphological 42 subfamily 42 evolutionary 42 hermaphroditic 42 clades 41 systematics 41 vertebrate animals 41 morphologies 41 diploid 41 evolutionary origins 41 vertebrates 41 Archaeopteryx 41 terrestrial ecosystems 41 mammals 41 marine invertebrates 41 rhesus macaque 41 transposable elements 41 single celled organisms 41 asexual reproduction 41 structure 41 primate evolution 41 pipefish 41 genetically identical 41 melanogaster 41 translocations 41 vertebrate species 41 temperate forests 41 motile 40 Indohyus 40 carnivorous dinosaurs 40 Cambrian explosion 40 sequenced 40 symbionts 40 nematode worms 40 Tiktaalik 40 arboreal 40 inhabitation 40 zebra finch 40 morphology 40 photosynthetic 40 biogeography 39 latitudinal 39 Ardipithecus 39 ovoid 39 eukaryotic 39 eukaryotes 39 symmetrical 39 ribonucleic acid RNA 39 ribozyme 39 organisms 39 speciation 39 bipedalism 39 peculiar 39 fossilization 39 trophic 39 gut microbes 39 evolutionarily 39 skeletonized 39 imprinted genes 39 phylogenetic tree 39 greenish brown 39 flagellum