Related by context. Frequent words. (Click for all words.) 67 placental mammals 63 marine invertebrates 63 subfamily 62 phyla 61 toothed whales 61 vertebrate animals 60 Indohyus 60 T. gondii 60 unicellular 59 mitochondrial genome 59 evolutionarily 59 morphologically 58 evolutionary origins 58 feathered dinosaurs 58 amino acid sequences 58 genus Homo 58 carnivorous dinosaurs 58 pipefish 57 crocodilians 57 arthropod 57 mammalian species 57 theropod 57 stickleback 57 gut microbes 57 multicellular organisms 57 sexual dimorphism 56 lampreys 56 marine reptiles 56 angiosperms 56 taxa 56 trilobites 56 single celled organisms 56 vertebrates 56 evolutionarily conserved 56 phylum 56 monkeys apes 56 mammalian 56 Caenorhabditis elegans 56 hominins 56 anthropoids 56 aquatic invertebrates 55 vertebrate 55 tetrapod 55 baleen whales 55 clades 55 mammals 55 primate species 55 simian immunodeficiency virus 55 taxon 55 mammalian brain 55 lineages 54 melanosomes 54 Homo sapiens 54 theropods 54 archaea 54 Australopithecus 54 Ardipithecus 54 prokaryotes 54 primate evolution 54 gobies 54 genetic variability 54 foraminifera 54 phylogenetic 54 phylogenetic tree 53 vertebrate species 53 interbred 53 motile 53 invertebrate species 53 phylogeny 53 species 53 histone modifications 53 microbiota 53 protozoan 53 herbivorous 53 imprinted genes 53 Ardipithecus ramidus 53 microbiome 53 phylogenetic analysis 53 tyrannosaurs 53 multicellular 53 clade 53 genetically distinct 53 cichlids 53 major histocompatibility complex 53 seals sea lions 53 sticklebacks 53 Archaeopteryx 53 superfamily 52 morphologies 52 Archaea 52 melanogaster 52 platypuses 52 eukaryotic cells 52 crocodilian 52 morphogenesis 52 nonhuman primates 52 defensins 52 Mitochondrial DNA 52 tyrannosaur 52 Tiktaalik 52 Anopheles gambiae