Related by context. Frequent words. (Click for all words.) 62 placental mammals 62 unicellular 59 nematode worms 57 single celled 57 single celled organisms 57 Xenopus 57 archaea 55 symbiont 55 prokaryotes 55 ribonucleic acid RNA 55 haploid 55 ribozyme 55 Indohyus 55 flatworms 55 protozoan 55 chloroplasts 55 mitochondrial genome 54 reproduce asexually 54 defensins 54 flagellum 54 fruit fly Drosophila 54 multicellular organisms 54 elegans 54 clades 53 symbionts 53 eukaryotic 53 amino acid sequences 53 nucleotide sequence 53 subfamily 53 imprinted genes 53 transposable elements 53 ribozymes 53 eukaryotes 53 evolutionary origins 53 Caenorhabditis elegans 53 stickleback 53 mammalian 53 Homo sapiens 53 melanosomes 53 eukaryotic cells 53 olfactory receptors 53 dynamin 53 melanogaster 52 phyla 52 Archaea 52 homologs 52 vertebrates 52 C. elegans 52 HLA genes 52 slime molds 52 convergent evolution 52 multicellular 52 methylation patterns 52 flagella 52 evolutionarily conserved 51 FOXP2 51 vitamin D receptor 51 simian immunodeficiency virus 51 Tiktaalik 51 chloroplast 51 Anopheles gambiae 51 Gansus 51 diploid 51 homology 51 baleen whale 51 platypuses 51 common ancestor 51 vertebrate 51 amphipods 51 theropod dinosaurs 51 toothed whales 51 glycoproteins 51 carnivorous dinosaurs 51 Neandertals 50 phylogenetic tree 50 slime mold 50 genetic sequences 50 theropod 50 centrosomes 50 Hox genes 50 genomic sequence 50 T. gondii 50 foraminifera 50 bacterial genome 50 PrP 50 mutant proteins 50 RNA molecule 50 lineages 50 snail shells 50 Fruit flies 50 plesiosaurs 50 micro RNA 49 mammalian brain 49 Wolbachia 49 biological molecules 49 dinoflagellates 49 otolith 49 genomic sequences 49 phylum 49 crocodilians 49 Ardipithecus