Related by context. Frequent words. (Click for all words.) 65 sociality 60 nonhuman animals 59 mutualism 56 sexual dimorphism 56 evolutionarily 54 altruism 54 evolutionary psychologists 54 vertebrate animals 53 relatedness 53 imprinted genes 53 prokaryotes 53 evolutionary 53 slime molds 53 prosocial 53 Evolutionary biologists 53 gut microbiota 52 evolutionary origins 52 convergent evolution 52 hermaphrodites 52 Caenorhabditis elegans 52 unicellular 52 asexual reproduction 52 macroevolution 52 phylogenetic 52 microbial ecology 52 histone modifications 52 multicellular organisms 52 nurturance 52 gut microbes 51 sociobiology 51 Frans de Waal 51 evolutionarily conserved 51 Indohyus 51 symbionts 51 mechanistically 51 nematode worms 51 nonhuman primates 51 phylogenetic analysis 51 serial monogamy 51 heritable 50 FGF# 50 morphologically 50 eukaryotic cells 50 physiological mechanisms 50 hermaphroditic 50 irreducibly complex 50 symbiont 50 epistemic 50 olfaction 50 reproduce asexually 50 Drosophila melanogaster 50 nonliving 50 phenotype 50 innate abilities 50 circadian clocks 49 mammalian 49 polygyny 49 rhodopsin 49 eukaryotes 49 planktonic 49 neuronal cells 49 gut flora 49 evolutionary biologists 49 symbiotic relationships 49 homologs 49 cichlids 49 gamete 49 parasitism 49 melanogaster 49 evolutionary adaptation 49 neurobiological 49 morphological 49 habituation 49 multicellular 49 adaptive immunity 49 phylogeny 49 asexuality 49 taxa 49 Altruism 49 organisms 49 volitional 49 microbiome 48 nonhuman 48 neurochemistry 48 homology 48 vertebrate 48 single celled 48 morphogenesis 48 hES cells 48 zooxanthellae 48 germline 48 rational beings 48 neural cells 48 genetic variability 48 altruists 48 NKT cells 48 Notch signaling 48 humans 48 phenotypes 48 Xenopus 48 teleological