Related by context. Frequent words. (Click for all words.) 67 avian species 61 vertebrates 61 Wolbachia 60 vertebrate 60 mammals 60 mammalian 60 primate species 59 vertebrate species 59 species 59 nonhuman primates 57 herpes viruses 57 mammal species 56 asexual reproduction 56 FOXP2 56 taxa 55 carnivorous dinosaurs 55 simian immunodeficiency virus 55 bird species 55 coronaviruses 55 clades 54 subfamily 54 multicellular organisms 54 Toxoplasma 54 prokaryotes 54 genetic variability 53 morphologically 53 mitochondrial genome 53 Ardipithecus 53 amphibian species 53 marine invertebrates 53 eukaryotic cells 53 roundworms 53 humans 53 infects humans 53 primates 53 arthropod 53 ant species 52 crocodilians 52 Caenorhabditis elegans 52 lineages 52 gene sequences 52 theropod 52 serotype 52 Archaeopteryx 52 eukaryotic 52 clade 52 tyrannosaur 52 reproductive biology 51 evolutionarily 51 theropods 51 genetic alteration 51 neurones 51 acetylation 51 phylogeny 51 olfaction 51 protozoan 51 prion disease 51 gene expression patterns 51 C. elegans 51 marsupials 51 avian flu viruses 51 mammalian brain 51 genetic alterations 51 prion diseases 51 thylacine 51 avian influenza viruses 51 miRNAs 51 fruit fly Drosophila 51 herpesvirus 51 frog species 51 neuronal cells 50 roundworm 50 P. falciparum 50 subtypes 50 mammal 50 Neandertal 50 germ cells 50 hominin 50 genetic diversity 50 evolutionary adaptation 50 amino acid sequence 50 terrestrial ecosystems 50 isoforms 50 microbiota 50 heritable 50 H. erectus 50 genetically distinct 50 clonal 50 tetrapod 50 germline 50 innate immunity 49 subspecies 49 sensory organs 49 parasitic worms 49 Denisovans 49 phylogenetic 49 rhodopsin 49 transgenes 49 receptor protein 49 Leishmania 49 skinks