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(Click for frequent words.) 77 vertebrate 73 mammals 69 mammalian 66 placental mammals 64 multicellular organisms 63 vertebrate evolution 62 chordates 62 vertebrate animals 62 vertebrate species 62 sauropod dinosaurs 62 crocodilians 62 eukaryote 62 terrestrial vertebrates 62 taxa 62 bilaterians 62 Archaeopteryx 61 multicellular 61 australopithecines 61 mammalian species 61 monotremes 61 Platynereis 60 archeopteryx 60 Acanthostega 60 subfamily 60 anthropoids 60 Ichthyostega 60 tetrapods 60 tyrannosaurids 60 cnidarians 60 colugos 60 arthropods 60 species 60 ornithischians 60 backboned animals 60 theropods 60 mosasaurs 59 ancient arthropods 59 hominid 59 choanoflagellates 59 Homo sapiens 59 sexual dimorphism 59 deuterostomes 59 tetrapod 59 Heterodontosaurus 59 hominin 59 primate species 59 eukaryotes 59 pterosaurs 59 metazoans 58 marine invertebrates 58 sauropods 58 mammalian brain 58 theropod 58 theropod dinosaurs 58 hominids 58 dromaeosaurs 58 carnivorous dinosaurs 58 echinoderms 58 bony fishes 58 herbivorous dinosaurs 58 melanogaster 58 dromaeosaurid 58 Ardipithecus 58 toothed whales 58 angiosperms 58 hominid species 58 phyla 58 archosaurs 58 genus Homo 57 mammal 57 multicellular animals 57 planaria 57 ichthyosaurs 57 Homo genus 57 nonhuman primates 57 primate ancestors 57 Australopithecus 57 Sauropods 57 plesiosaurs 57 Homo species 57 metazoan 57 distantly related species 57 H. sapiens 57 primitive vertebrates 57 herbivores 57 prokaryotes 57 genus Australopithecus 57 neural crest cells 57 tyrannosaurs 57 vesper bats 57 australopithecine 57 coelurosaurs 57 placentals 57 ostracods 56 single celled organisms 56 stickleback 56 invertebrates 56 humans Homo sapiens 56 lobe finned fishes 56 Late Triassic 56 jawed vertebrates 56 primate lineage 56 prosimians 56 lemur species 56 eukaryotic 56 H. habilis 56 avian species 56 convergent evolution 56 crinoids 56 worm C. elegans 56 feathered dinosaurs 56 organisms 56 primate evolution 56 humans 56 jawless fish 56 morphologically 56 hindlimbs 56 animal phyla 56 avian dinosaurs 56 Paranthropus robustus 56 horned dinosaurs 56 invertebrate animals 56 predatory dinosaurs 56 Darwin finches 55 A. sediba 55 carnivore species 55 bipedalism 55 flatfishes 55 fruitflies 55 artiodactyls 55 evolutionary lineage 55 Hox genes 55 Paranthropus 55 hominoid 55 Panderichthys 55 pterosaur 55 mammalian genomes 55 multi celled organisms 55 C. elegans 55 primates 55 tyrannosaur 55 Chlamydomonas 55 extinct mammals 55 amphibians 55 Ventastega 55 H. floresiensis 55 phylogenetically 55 hadrosaurs 55 crocodilian 55 mammal species 55 Gansus 55 theropod dinosaur 55 mammalian carnivores 55 Psittacosaurus 54 terrestrial mammals 54 hominins 54 echolocating bats 54 unicellular 54 Archaea 54 herbivorous insects 54 fossils 54 trilobites 54 amphioxus 54 sexually dimorphic 54 bdelloid rotifers 54 Neandertals 54 multicellularity 54 Indohyus 54 Diplodocus 54 faunas 54 Tiktaalik 54 Xenopus 54 ramidus 54 phylogeny 54 protists 54 morphological 54 nematode worms 54 Devonian Period 54 sauropodomorphs 54 habilis 54 Drosophila 54 evolutionarily 54 H. erectus 54 flatworms 54 photosynthetic organisms 54 Homo erectus 54 forelimbs 54 isoforms 54 terrestrial ecosystems 54 eukaryotic cells 54 marine reptiles 54 limbed vertebrates 54 ape ancestor 54 Pterosaurs 54 angiosperm 53 Pierolapithecus 53 monkeys apes 53 dinosaurs 53 vertebrate fossils 53 carnivorous mammals 53 Anomalocaris 53 hindbrain 53 hominin species 53 lobe finned fish 53 mammalian genome 53 tetrapods evolved 53 olfactory receptors 53 multi celled 53 Late Cretaceous 53 stegosaurs 53 microcephalin 53 Microraptor 53 subfamilies 53 Ediacaran 53 hominoids 53 Theropods 53 lineages 53 phylum 53 eusocial 53 phenotypic differences 53 clades 53 archosaur 53 hominin fossils 53 A. afarensis 53 Cambrian explosion 53 baleen whale 53 bird Archaeopteryx 53 Australopithecus africanus 53 reproductively isolated 53 ontogeny 53 neurones 53 brachiopods 53 crurotarsans 53 hominid evolution 53 symbiotic bacteria 53 baleen whales 53 Volvox 53 eukaryotic organisms 53 herbivorous 53 damselflies 52 ectotherms 52 evolutionary 52 Gigantopithecus 52 Ardipithecus ramidus 52 HAR1 52 mammalian predators 52 epithelial tissues 52 Osedax 52 conspecifics 52 damselfish 52 unicellular organisms 52 Trichoplax 52 coding genes 52 Laetoli footprints 52 odorant receptors 52 piRNAs 52 single celled 52 tiny single celled 52 commensal bacteria 52 Linhenykus 52 freshwater fishes 52 A. ramidus 52 homo sapiens 52 non mammalian vertebrates 52 morphological traits 52 Confuciusornis 52 Mammals 52 phylogeographic 52 hominid ancestors 52 predator prey relationship 52 species Australopithecus afarensis 52 gymnosperms 52 rhodopsin 52 birds amphibians reptiles 52 teleost fish 52 caecilians 52 FOXP2 52 Homo sapiens evolved 52 Tyrannosaurs 52 common ancestor 52 endemism 52 motile cilia 52 prehuman 52 symbionts 52 Baleen whales 52 mantis shrimp 52 Australopithecines 52 phylogenetic 52 titanosaurs 52 amphibians reptiles birds 52 bryozoans 51 placental mammal 51 phenotypes 51 granule cells 51 winged dinosaur 51 apelike 51 sauropod 51 HLA genes 51 Prototaxites 51 megafauna 51 coral species 51 mangabeys 51 anomodonts 51 photosynthetic microbes 51 T. rex 51 ciliates 51 sensory organ 51 evolutionarily conserved 51 organismal 51 C4 grasses 51 phenotypic variation 51 mammals reptiles birds 51 archaea 51 speciation 51 annelid worms 51 Hox gene 51 phylogenies 51 TRPA1 51 bryophytes 51 olfaction 51 morphologically distinct 51 lemurs 51 hoofed mammals 51 kipunji 51 bipedal dinosaurs 51 evolutionary lineages 51 insectivores 51 clade 51 noncoding RNAs 51 monophyletic 51 prokaryote 51 Castorocauda 51 ant species 51 morphological evolution 51 cryptochromes 51 Quetzalcoatlus 51 TRP channels 51 epigenetic changes 51 amphibian species 51 Caenorhabditis elegans 51 anthropoid primates 51 Microraptor gui 51 tuataras 51 frog species 51 fruit fly Drosophila 51 melanosomes 51 embryological 51 placoderms 51 Europasaurus 51 carnivorous dinosaur 51 chromosomal translocations 51 mitochondrial genome 51 braincase 51 ichthyosaur 51 imprinted genes 51 fossil 51 orthologs 51 vertebrate genomes 51 symbiont 51 Firmicutes 51 coelacanth 51 Trilobites 51 olfactory bulb 51 polyploids 51 placoderm 51 Australopithecus sediba 51 dinosaurian 51 Gombe chimps 50 circadian clocks 50 planarians 50 springtails 50 Stegodon 50 cold blooded creatures 50 marsupials 50 Mammalia 50 bony structures 50 Sahelanthropus 50 synaptic proteins 50 gracile 50 taxon 50 Repenomamus 50 archaeal 50 ipRGCs 50 LB1 50 zebrafish 50 gorilla chimpanzee 50 coevolution 50 Late Devonian 50 Abydosaurus 50 reproduce asexually 50 Cambrian Explosion 50 vertebrate embryos 50 eukaryotic cell 50 GnIH 50 Homo habilis 50 paralogs 50 spiny anteater 50 felids 50 monotreme 50 Guanlong 50 Mesozoic mammals 50 threespine sticklebacks 50 mammal lineages 50 PancakeCroc 50 sediba 50 Aplysia 50 protozoans 50 otolith 50 mitochondrial genomes 50 neural crest 50 striated muscle 50 heritable traits 50 insects crustaceans 50 morphology 50 Cretaceous extinction 50 sympatric speciation 50 saber tooth cats 50 Massospondylus 50 oviraptors 50 Linheraptor 50 histone modifications 50 platypuses 50 chordate 50 biogenesis 50 Prochlorococcus 50 interconversion 50 evolutionary origins 50 eyespots 50 Apatosaurus 50 predator prey interactions 50 primitive organisms 50 mole rats 50 Spinosaurus 50 genetic lineages 50 superfamily 50 evolutionary adaptation 50 cavefish 50 ciliated 50 Homo neanderthalensis 50 FOXP2 gene 50 Dunkleosteus 50 Sahelanthropus tchadensis 50 Denisovan 50 crocodiles alligators 50 Wnt proteins 50 dimorphic 50 comb jelly 50 birdlike dinosaur 50 amphipods 50 Darwinius 50 motile 50 prestin 50 ecological niches 50 mammalian brains 50 arthropod 50 ratites 50 vasopressin receptors 50 temperate forests 50 asexual reproduction 50 mosasaur 50 Early Cretaceous 50 Phytophthora species 50 ecoregions 50 Moczek 49 salamanders 49 honeybee Apis mellifera 49 penile spines 49 endemic species 49 subcellular compartments 49 Zhe Xi Luo 49 Late Jurassic 49 lizards 49 hind limbs 49 T. hallae 49 ancient hominids 49 Anchiornis 49 Prevotella 49 teosinte 49 primate genomes 49 Proteobacteria 49 distinct lineages 49 ependymomas 49 single celled yeast 49 erectus 49 pelvic fins 49 giant tortoises 49 mangabey 49 epigenetic modifications 49 Sinosauropteryx 49 red colobus 49 neuronal cells 49 stellate cell 49 T. gondii 49 Haast eagle 49 vocalisations 49 Comparative genomics 49 radial glia 49 genetic alteration 49 isopods 49 Sonic hedgehog 49 Osedax worms 49 Pakasuchus 49 evolutionarily ancient 49 echolocation 49 Cambrian Period 49 biogeographic 49 homeobox genes 49 somites 49 Iguanodon 49 testis 49 Orrorin 49 Mus musculus 49 otoliths 49 non coding RNA 49 pharynx 49 homologs 49 Pan troglodytes 49 cichlid species 49 amino acid sequences 49 flowering plants 49 terrestrial mammal 49 Falcarius 49 superorganism 49 lunglessness 49 Sumatran orangutans 49 mitochondrial gene 49 Eoraptor 49 Vertebrate 49 Xenopus laevis 49 Woese 49 species Homo sapiens 49 pectoral fins 49 feathered dinosaur 49 diatoms 49 anamensis 49 Dakosaurus 49 microbial ecosystems 49 mammal fossils 49 T.rex 49 primary cilium 49 fungal genomes 49 planktonic 49 microbiome 49 mammalian embryo 49 naked mole rats 49 dinosaur species 49 therizinosaurs 49 spookfish 49 flatworm 49 carnivorous mammal 49 sensory receptors 49 neocortex 49 contagious yawning 49 angiosperms flowering plants 49 Brontomerus 49 hominid fossils 49 Galapagos finches 49 endocasts 49 knifefish 49 eukaryotic genomes 49 spotted hyenas 49 ape ancestors 49 evolutionary biologists 49 Plasmodium 49 lungless 49 eusociality 49 Raptorex 49 Homo floresiensis 49 evolutionary adaptations 49 fearsome predator 49 multicellular organism 49 mammalian evolution 49 paleobiology 49 endosymbiosis 49 peccaries 49 conodonts 49 toothless beak 49 torosaurus 49 cilia 49 amoebae 49 ostracodes 49 Inkayacu 49 phenotypically 49 chimpanzee genomes 49 sticklebacks 49 echidnas 49 quadrupedal 49 cichlids 49 sexually reproducing 49 evolutionary divergence 49 mammal extinctions 49 opsins 49 Drosophila melanogaster 49 p# mutations 49 zooplankton species 49 legged carnivores 49 Platypuses 49 cartilaginous fish 49 biosynthetic pathways 48 Brusatte 48 chimpanzees 48 Kosmoceratops 48 neural crest stem cells 48 A. thaliana 48 ray finned fishes 48 passerine birds 48 neuroendocrine 48 Pygmy hippos 48 evolvability 48 species reproduce asexually 48 caecilian 48 Arabidopsis 48 quill knobs 48 neural circuitry 48 gliding mammals 48 nematode worm 48 genus 48 microbiota 48 worm Caenorhabditis elegans 48 mega fauna 48 mammoths mastodons 48 homology 48 scleral ring 48 mouse lemur 48 scutes 48 segmented worms 48 Wolbachia 48 Eukaryotes 48 Neanderthal genes 48 ncRNAs 48 crocodiles turtles 48 flagellum 48 C. neoformans 48 Neandertal 48 biogeographical 48 zooplankton 48 auditory neurons 48 primary cilia 48 orthologous genes 48 Irmis 48 Denisovans 48 pygmy chimpanzees 48 nocturnal primate 48 Neanderthals 48 neurons 48 parasitoid wasp 48 microRNAs miRNAs 48 steppe mammoth 48 endosymbiont 48 Cenozoic 48 heritable 48 primate cousins 48 blind cavefish 48 herbivory 48 dizygotic twins 48 sRNA 48 terrestrial vertebrate 48 TMEM#B 48 Alu elements 48 multicellular creatures 48 neuronal 48 neural mechanisms 48 trichromatic vision 48 previously undescribed 48 hind fins 48 synaptic function 48 crinoid 48 invertebrate species 48 spotted hyena 48 apes 48 robustus 48 primate 48 hibernating mammals 48 stomata 48 Velociraptor 48 Anchiornis huxleyi 48 Lamarckian 48 Middle Paleolithic 48 somatic stem cells 48 annelids 48 extinct mammal 48 slime molds 48 Daeschler 48 missense mutations 48 neuronal pathways 48 Or#b 48 bacteria archaea 48 insect pollinators 48 sensory neurons 48 tree shrews 48 parthenogenetic 48 Coelacanths 48 biota 48 transcriptomes 48 ncRNA 48 Rugops 48 hibernators 48 sea anemones 48 Makovicky 48 sauropod dinosaur 48 stag beetle 48 sifakas 48 Ice Age mammals 48 transcriptional regulators 48 RBP4 48 pathogenic mutations 48 pseudogene 48 cortical neurons 48 catfishes 48 mammalian ancestor 48 spontaneous mutations 48 mice lacking 48 Repenomamus robustus 48 flagella 48 mammals reptiles 48 plexin D1 48 O. tugenensis 48 coccolithophores 48 anthropoid 48 bilaterally symmetrical 48 sengi 48 Orrorin tugenensis 48 MHC genes 48 peccary 48 cytochrome b 48 fossilized footprints 48 Symbiodinium 48 prion gene 48 viral genomes 48 irreducibly complex 48 tapetails bignose fishes 48 Dicer enzyme 48 Nimbadon 48 aquatic vertebrates 48 marsupial lions 48 meadow vole 48 liverworts 48 organism 48 corvid 48 Carnivora 48 extinctions 48 microcephalic 48 epithelial cancers 48 pseudogenes 48 posttranslational modifications 48 invertebrate 48 toothed whale 48 Laonastes 48 midgut 48 D2 receptors 48 Homo heidelbergensis 48 aquatic invertebrates 48 dinosaur lineages 48 STAT4 48 extinct reptiles 48 epigenetic mechanisms 48 Barn owls 48 larval stage 48 homo habilis 48 steroid hormones 48 sauropodomorph 48 horned Triceratops 48 transcriptional regulation 48 virulence genes 48 mammals amphibians 48 excitatory synapses 48 gene duplications 47 taxonomic 47 Mesozoic era 47 photoreceptor 47 olfactory neurons 47 chimpanzees Pan troglodytes 47 hominid fossil 47 earliest hominid 47 coronaviruses 47 phylogenetic relationships 47 Indricotherium 47 weta 47 gut microbiota 47 bipedal locomotion 47 Plesiosaurs 47 TRIM5 47 nonhuman primate 47 miRNA expression 47 Vertebrates 47 auklets 47 Ambystoma 47 herbivore 47 Homo antecessor 47 coral reef fishes 47 chimp genomes 47 dragonflies 47 H. heidelbergensis 47 Micromonas 47 PrPC 47 Homo erectus evolved 47 hypothalamic neurons 47 gobies 47 spiders scorpions 47 morphogenesis 47 frogs toads salamanders 47 translocations 47 miRNAs 47 nematode Caenorhabditis elegans 47 Ganlea 47 Smilodon 47 sensory organs 47 Hominids 47 axon guidance 47 insectivore 47 earliest hominids 47 Cretaceous Period 47 captive chimpanzees 47 FGF# 47 ribonucleic acids 47 echolocate 47 bird species 47 planarian 47 moths butterflies 47 embryogenesis 47 Asilisaurus 47 cephalopods 47 cichlid 47 neotropical 47 phenotype 47 horned lizards 47 Amborella 47 planktonic foraminifera 47 flightless birds 47 auxin 47 Kipunji 47 mitochondrial proteins 47 Scientists theorize 47 soluble proteins 47 Juravenator 47 notochord 47 molecular mechanisms underlying 47 echinoderm 47 malformations 47 phthalate syndrome 47 Diptera 47 chimplike 47 genetic variation 47 ectothermic 47 sister taxon 47 sea anemones corals 47 limbic system 47 neuronal synapses 47 Woolly mammoths 47 Tarbosaurus 47 PKD1 47 hyrax 47 ontogenetic 47 midbrain 47 Peromyscus 47 anatomically modern 47 Dakosaurus andiniensis 47 fossil specimens 47 vertebrate fossil 47 Dictyostelium 47 V#F mutation 47 bacterial symbiont 47 roundworm 47 venomous lizards 47 Protoceratops 47 interneurons 47 ciliary 47 CTCF 47 morphological similarities 47 methylation patterns 47 known bird Archaeopteryx 47 diatom 47 sifaka 47 molluscan 47 African cichlid fish 47 cetaceans 47 nocturnal mammals 47 hemoglobins 47 microsporidia 47 Cyanobacteria 47 parasitoids 47 Wnt signaling 47 genera 47 HSPCs 47 Chlamydomonas reinhardtii 47 pterodactyls 47 legless lizards 47 chimaeras 47 Sauropod 47 locomotion 47 undescribed species 47 inbreeding depression 47 acetylation 47 enterotypes 47 Hh pathway 47 collared peccary 47 retinal neurons 47 carnivores 47 Icadyptes 47 photosynthetic 47 platypus genome 47 Columbian mammoth 47 genetically distinct 47 dinosaur extinction 47 polyploid 47 gambiae 47 phenotypic traits 47 trophic 47 cholesterol metabolism 47 celled creatures 47 indels 47 single celled bacteria 47 orangs 47 grasshopper sparrow 47 zebrafish Danio rerio 47 Albertosaurus 47 supertree 47 Triassic Period 47 vitellogenin 47 Glial cells 47 Cetomimidae 47 prokaryotic 47 mutant mouse 47 hematopoietic cells 47 lungfish 47 Australopithecus anamensis 47 microcephalics 47 morphogen 47 Paranthropus boisei 47 bushbabies 47 canid 47 barbels 47 D. melanogaster 47 symbioses 47 foraminifera 47 ortholog 47 microbiomes 47 haplogroups 47 odorant receptor 47 locomotor 47 gorilla subspecies 47 bacterial genomes 47 neuroligins 47 homo sapiens sapiens 47 sporadic ALS 47 herpes viruses 47 stromatolites 47 Australopithecus afarensis 47 CCR7 47 mutualistic 47 fearsome Tyrannosaurus rex 47 microhabitats 47 taste receptors 47 sensu lato 47 Candida species 47 synaptic plasticity 47 paleobiologists 47 Majungatholus 46 long necked sauropod 46 Pääbo 46 larval stages 46 alpha synuclein gene 46 gastropod 46 Anopheles 46 HOX genes 46 marsupial mammals 46 Hsp# [001] 46 sequence homology 46 horseshoe bats 46 diatom species 46 morphologies 46 Fossils 46 mantis shrimps 46 socially monogamous 46 long beaked echidna 46 honeycreepers 46 defensins 46 bony plates 46 female gametophyte 46 bryozoan 46 visual cortex 46 neuronal circuits 46 dynamin 46 heterochromatin 46 comb jellies 46 mammoths 46 zebra finch 46 motoneurons 46 fossilized remains 46 trichomes 46 genes encoding 46 ubiquitin ligases 46 inbred strains 46 brown anole 46 circadian 46 Pongo pygmaeus 46 mRNA molecules 46 Pleistocene 46 sphingolipid