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(Click for frequent words.) 71 flagella 69 bacterial flagellum 67 Caulobacter crescentus 64 flagellar 64 prokaryote 62 FtsZ 62 flagellar motor 62 unicellular 61 celled organism 61 riboswitch 61 irreducible complexity 60 eukaryotic cell 60 cilium 60 bacterium Escherichia coli 59 eukaryote 59 actin filaments 59 ribozyme 59 unicellular organism 59 centrioles 59 bilaterally symmetrical 58 snail shell 58 gill slits 58 radula 58 helices 58 rotifer 58 Prevotella 58 histone protein 58 titin 57 processive 57 bacterium E. coli 57 single celled organism 57 chaperonin 57 irreducibly complex 57 CPEB 57 organelle 57 Spiroplasma 57 inchworm 57 myosins 57 endosymbiosis 57 RNA molecule 57 bipedal locomotion 57 fission yeast 57 Caulobacter 57 paramecia 57 endosymbiont 57 pelvic fin 57 lipid bilayer 57 ciliated 57 actin filament 56 kinesin motor 56 toroid 56 Dictyostelium 56 ATP synthase 56 Chlamydomonas reinhardtii 56 primary cilium 56 nanomachine 56 single celled 56 motile 56 endonucleases 56 telomeric DNA 56 colloidal particles 56 X. laevis 56 tetramers 56 di GMP 56 synaptotagmin 56 Alu elements 56 Chlamydomonas 56 polypeptide chain 55 sarcomere 55 outer membrane 55 DNA helix 55 telomere DNA 55 quantum particle 55 C. neoformans 55 convergent evolution 55 endonuclease 55 Dicer enzyme 55 notochord 55 disulfide bonds 55 pelvic fins 55 Xenopus laevis 55 poly dA 55 metazoan 55 soliton 55 PfEMP1 55 disulfide bond 55 zebrafish embryo 55 unicellular organisms 55 organelles 55 Hox gene 55 tRNAs 55 CRISPR Cas 55 protein subunits 55 bdelloid rotifers 55 TRF1 55 organism 55 alpha helices 55 duplicated chromosomes 55 hemoglobin molecules 55 sphingomyelin 55 chromatin proteins 55 paramecium 55 stilbene 54 double helix 54 polymerases 54 RecA 54 receptor molecule 54 helical structures 54 Dynein 54 bacterial flagella 54 calmodulin 54 whiplike 54 prestin 54 fibril 54 piRNAs 54 myosin 54 cleavage furrow 54 condensin 54 nematode worm 54 protozoan 54 opposable thumb 54 Volvox 54 multicellular organisms 54 bony structures 54 Trichoplax 54 nanomotor 54 ribosomal DNA 54 neural crest cells 54 tubule 54 macromolecule 54 homologs 54 amino acid residues 54 green alga 54 nucleotide sequence 54 Fig. 3a 54 operons 54 morphogen 54 protein filaments 54 protists 54 flatworm 54 conformational changes 54 oviducts 54 microcephalin 54 ontogeny 54 trimers 54 eukaryotic cells 54 bacteria Escherichia coli 54 Pax6 54 amoeboid 54 fruitflies 54 RNA fragments 54 collagen fibrils 54 vertebrate embryos 54 prokaryotes 54 S. typhimurium 54 centromeric 54 gastrulation 54 kinetochores 54 F actin 54 hemoglobin molecule 54 fractal pattern 54 rhodopsin 54 mitochondrion 54 nanomotors 54 exonuclease 54 spindle fibers 54 zebrafish Danio rerio 54 viral capsid 54 spheroidal 54 genetic recombination 54 chromatids 53 adherens junctions 53 actin binding 53 Argonaute proteins 53 magnetic monopoles 53 chordates 53 microevolution 53 intramolecular 53 Ichthyostega 53 NEDD8 53 micromachine 53 trypanosome 53 centromeres 53 Brownian motion 53 S. cerevisiae 53 heterochromatic 53 CTCF 53 FEN1 53 dimer 53 magnesium ion 53 transposable elements 53 photosynthetic bacterium 53 tiny roundworm 53 receptor subunit 53 uracil 53 D. melanogaster 53 mitochondrial gene 53 ribonucleic acid RNA 53 mRNA molecules 53 phi# 53 B. subtilis 53 vesicle 53 metazoans 53 kinesins 53 nanomagnets 53 sensory organ 53 quantum superposition 53 tRNA 53 vacuolar 53 nanomachines 53 semicircular canals 53 photosystem II 53 mouthparts 53 single celled organisms 53 ATPases 53 Hox genes 53 morphological evolution 53 centromere 53 capsids 53 prokaryotic 53 pathogenic bacterium 53 PrP 53 protuberances 53 introns 53 hydrogenase 53 Nbs1 53 dynamin 53 amyloid fibrils 53 spermatic cord 53 fig. S1 53 icosahedral 53 nucleotide sequences 53 helical structure 53 nucleolus 53 RNA enzymes 53 supramolecular 53 multicellular 53 Xenopus 53 membrane protein 53 Quantum mechanics 53 somites 53 histone proteins 53 ectoderm 53 sulfur atom 53 ultracold molecules 53 SNARE complex 53 Ago2 53 ribonucleic acid 53 lipid membrane 53 adduct 53 quantum tunneling 53 Hsp# [001] 53 locomotion 53 fungal genomes 53 coiled coil 53 beta globin 52 striated muscle 52 laser tweezers 52 archeopteryx 52 primordia 52 aerobic metabolism 52 Tetrahymena 52 Physarum 52 molecule 52 mitochondrial genome 52 replicase 52 TEP1 52 calpastatin 52 helix 52 Anomalocaris 52 Neurospora 52 reproduces asexually 52 actin fibers 52 morphogens 52 planaria 52 Sonic hedgehog 52 cilia 52 mesenchyme 52 olfactory receptor 52 subcellular structures 52 macroevolution 52 budding yeast 52 oscillatory 52 microfluidic channels 52 wavefunction 52 nucleases 52 APOBEC3G 52 luminal surface 52 viral genome 52 vertebrate 52 transcriptional machinery 52 sister chromatids 52 teleost fish 52 plasmodium 52 chordate 52 C. crescentus 52 Entamoeba 52 ribonuclease 52 magnetotactic bacteria 52 plastid 52 spirochete 52 trematode 52 embryological 52 biogenesis 52 chiral molecules 52 transposons 52 cysteines 52 noncoding 52 amphioxus 52 oligomerization 52 normal prion protein 52 T. brucei 52 hindlimbs 52 tetramer 52 capsid 52 quadrupedal 52 superorganism 52 centrosome 52 graphene sheet 52 organism genome 52 RNA polymerases 52 RNA polymerase 52 transposable element 52 cellulose synthase 52 clathrin 52 nematode worms 52 electron micrographs 52 multi celled 52 Shewanella 52 var genes 52 flatfishes 52 KaiC 52 myosin VI 52 globular proteins 52 effector protein 52 hemolymph 52 spicule 52 intracellular bacteria 52 tRNA genes 52 mammalian brains 52 rRNA 52 cellulose synthase complexes 52 RNA strand 52 PIP3 52 pectoral fins 52 lollipop shaped 52 RNA strands 52 pilus 52 proinsulin 52 vacuole 52 transcriptional repressor 52 bistability 52 cryptochrome 52 M. pneumoniae 52 contractile ring 52 wave particle duality 52 polypeptides 52 vinculin 52 5 hydroxymethylcytosine 52 barbels 52 archosaurs 52 magnesium ions 52 Scientists theorize 52 Evolutionary biologists 52 protist 52 Linhenykus 51 transposon 51 #BP# 51 outer membrane proteins 51 Rad# 51 PrPC 51 CD1d 51 distantly related species 51 evolutionary adaptation 51 X ray diffraction pattern 51 progerin 51 Schematic diagram 51 Agrobacterium tumefaciens 51 AMPA receptors 51 heterochromatin 51 5 methylcytosine 51 translocates 51 mammalian 51 heparan sulfate 51 trimeric 51 condensin II 51 morphological similarities 51 microbots 51 lipid membranes 51 teleost 51 stereocilia 51 TRIM5 51 macroscopic objects 51 replisome 51 DNA polymerase 51 non coding RNA 51 bacterial genome 51 Golgi apparatus 51 infectious prion proteins 51 Darwin finches 51 diatomic 51 focal adhesions 51 evolutionarily conserved 51 pelvic girdle 51 chick embryo 51 Darwinopterus 51 abnormal prions 51 poxvirus 51 chlorophylls 51 chemotaxis 51 tetherin 51 flatworms 51 chromosomal DNA 51 protein p# 51 Dirac fermions 51 lysostaphin 51 centrosomes 51 FOXP2 gene 51 quantum particles 51 superhydrophobic surfaces 51 Caenorhabditis elegans 51 fluorescently labeled 51 protein fragment 51 spherical particles 51 Prochlorococcus 51 rotaxanes 51 ciliates 51 catalytic subunit 51 endosome 51 germline cells 51 female reproductive tract 51 monotreme 51 codons 51 Drosophila embryos 51 bdelloids 51 Sup# 51 motile cilia 51 microcantilever 51 peduncle 51 copepods 51 epigenetic modification 51 Fig. 3b 51 circularly polarized light 51 resilin 51 siderophore 51 neo cortex 51 abiogenesis 51 polyhedra 51 morphogenesis 51 dynactin 51 phalanges 51 placoderms 51 green alga Chlamydomonas 51 swim bladders 51 virion 51 ssDNA 51 fluorescently tagged 51 photochemically 51 Maxwell equations 51 retrotransposons 51 chromatin structure 51 gp# [002] 51 H2AX 51 Fig. 2B 51 membrane fusion 51 microvilli 51 granulosa 51 Supplementary Fig 51 filamentous 51 odorant receptors 51 Acanthostega 51 gluon 51 wavefronts 51 Arabidopsis genome 51 antiparallel 51 planktonic 51 biomolecule 51 planarian 51 transgene 51 mammalian evolution 51 Argonaute 51 Bacillus subtilis 51 microrobot 51 prion strains 51 biological molecules 51 sequence homology 51 controllably 51 Borrelia burgdorferi 50 planarians 50 cadherins 50 plastron 50 hexamer 50 yolk sac 50 Hemagglutinin 50 D. simulans 50 primitive organisms 50 evolutionary lineage 50 tetrahedron 50 diffusive 50 homologies 50 piercing sucking mouthparts 50 M. capricolum 50 Sulfolobus 50 histone demethylase 50 hairlike 50 tubercles 50 PKD1 50 epigenetic modifications 50 hemolysin 50 prokaryotic organisms 50 Sonic Hedgehog 50 telomeric 50 vesicular stomatitis virus 50 hexose 50 totipotent 50 capsid protein 50 Daphnia 50 eukaryotic 50 cell cytoplasm 50 cohesin 50 artificial chromosomes 50 odorant molecule 50 RNAP enzyme 50 proteorhodopsin 50 SARS CoV 50 outer membranes 50 erythrocytes 50 ankyrin repeats 50 downstroke 50 recessive trait 50 primary cilia 50 seminiferous tubules 50 homunculus 50 diatom 50 chlorosomes 50 S. pombe 50 dermal papilla cells 50 hyoid 50 proline rich 50 manganese atoms 50 haemagglutinin 50 catalytically active 50 hollow cylindrical 50 X inactivation 50 placental mammals 50 microcompartments 50 holdfast 50 bacterial genomes 50 orb weaver 50 macromolecules 50 cell outer membrane 50 trilobite 50 mammalian genomes 50 effector proteins 50 site directed mutagenesis 50 upstroke 50 Mre# 50 PIP2 50 XPB 50 neuronal pathways 50 positional cloning 50 defensins 50 ipRGCs 50 alpha helix 50 disulfide bridges 50 nonmagnetic 50 nucleotides 50 scanning electron micrograph 50 cDNAs 50 Fig. 1c 50 PHLPP 50 cellulases 50 PrPSc 50 donor acceptor 50 cyclic peptides 50 mucoid 50 Scanning electron micrograph 50 unnatural amino acid 50 spirochetes 50 starch granules 50 hindbrain 50 bilayer 50 circadian clocks 50 primate lineage 50 V. cholerae 50 cysteine residues 50 phagocytosis 50 epigenetically 50 branes 50 paralogs 50 fruitfly Drosophila 50 zinc ions 50 cobalt atom 50 microcracks 50 conformational 50 primordial germ cells 50 bird beak 50 sexually dimorphic 50 quantum superpositions 50 RNA sequences 50 protonated 50 reprogramming genes 50 trypanosomes 50 anterograde 50 cyanobacterial 50 ectodomain 50 resonance frequency 50 interconversion 50 sterile neutrinos 50 electron orbits 50 spinneret 50 vomeronasal organ VNO 50 genetically encoded 50 annelid 50 noncoding DNA 50 protein conformation 50 ribozymes 50 adsorbate 50 solitons 50 Pollen grains 50 supersolid 50 Josephson junctions 50 quantum coherence 50 Tiktaalik 50 prion proteins 50 microsaccades 50 scrotal sac 50 van der Waals forces 50 photosynthetic organisms 50 antisense RNA 50 mammalian proteins 50 beta globin gene 50 ultrasonic vibrations 50 RoboSwift 50 Dakosaurus 50 Wnt proteins 50 homologous chromosomes 50 kilobase 50 fluorescent molecule 50 spaghetti noodle 50 evolvability 50 worm C. elegans 50 microchannel 50 macroscale 50 thrifty gene 50 leucine zipper 50 Anatomically 50 Plasmodium parasite 50 Vibrio fischeri 50 W bosons 50 normal prion proteins 50 virulence genes 50 peroxisome 50 firefly gene 50 zebrafish genome 50 unpaired electron 50 laforin 50 Fig. 2a 50 Trypanosoma brucei 50 punctuated equilibrium 50 photon pairs 50 chromophore 50 embryogenesis 50 streptavidin 50 oscillatory behavior 50 protozoans 50 Bose Einstein Condensate 50 Vpu 50 clades 50 chemoreceptors 49 ribonucleic acid molecules 49 nanocells 49 eukaryotes 49 topological defects 49 coexpression 49 Heterodontosaurus 49 ganglion cells 49 endothermic 49 electromagnets 49 Ubx 49 chromatid 49 glycosylated 49 dromaeosaurs 49 oligodendrocyte 49 magnetic vortices 49 hindgut 49 globin gene 49 rotifers 49 jointed legs 49 chlorosome 49 gene p# 49 acetyl groups 49 microorganism 49 Photorhabdus 49 haem 49 quantum entanglement 49 forelimbs 49 frameshift mutation 49 phosphorus atoms 49 subunits 49 euchromatin 49 Mycoplasma pneumoniae 49 telomerase RNA 49 topologically 49 genetic alteration 49 V3 loop 49 ubiquitin molecules 49 Fig. 1a 49 noncoding regions 49 vibrationally excited 49 Ventastega 49 calcium carbonate shell 49 rotaxane 49 protein synthesis machinery 49 neuronal synapses 49 E1A 49 eggbeater 49 primordial soup 49 chloroplasts 49 mutant strain 49 Streptococcus agalactiae 49 DNA strands 49 TRIM5 alpha 49 mutant proteins 49 Wnt protein 49 celled organisms 49 Staphylococcus epidermidis 49 alga 49 oxygen atom 49 Synechococcus 49 cometary material 49 Inkayacu 49 electrons behave 49 single celled bacteria 49 Brownian 49 lamina 49 noncoding RNAs 49 hemagglutinin gene 49 wormlike 49 electrons orbiting 49 dsRNA 49 amino acid substitutions 49 Fig. 2b 49 guanine 49 nitrogenase 49 archaeal 49 Platynereis 49 membrane lipids 49 Rubisco 49 microelectrode 49 GLUT4 49 histones 49 caudal 49 evolutionarily 49 antibody antigen 49 cytochrome b 49 amoebae 49 trabeculae 49 felis 49 sticklebacks 49 bacterium genome 49 amino acid alanine 49 metastable 49 LOV domain 49 protease enzyme 49 Lamarckian 49 vacuoles 49 viral genomes 49 planetary magnetospheres 49 stickleback 49 dimorphic 49 alpha hemolysin 49 nanorod 49 yeast genome 49 amoebas 49 plastids 49 quantum weirdness 49 protozoan parasite 49 fibronectin 49 nucleocapsid 49 semicircular canal 49 bdelloid rotifer 49 protocells 49 NF1 gene 49 Notch signaling 49 Mycoplasma genitalium 49 photosystems 49 magnetic excitations 49 strontium atoms 49 filaments 49 Plasmodium 49 RNA molecules 49 vortices 49 mutational 49 arachnoid 49 monomeric 49 endoderm 49 thermophilum 49 magnetic bead 49 Confuciusornis 49 rostral 49 IgY 49 spintronic device 49 lobe finned fishes 49 excitatory neurons 49 ameba 49 anal fins 49 unpaired electrons 49 trophoblasts 49 crinoid 49 roundworm C. elegans 49 phagosomes 49 worm Caenorhabditis elegans 49 RNA genome 49 mitochondrial genomes 49 fluorescent tags 49 deuterostomes 49 protocell 49 epigenetic inheritance 49 copepod 49 metamaterial structures 49 ectodermal 49 metabolic enzymes 49 drosophila 49 clawlike 49 chirality 49 palps 49 subcellular compartments 49 blastomeres 49 tiny tubules 49 multicellularity 49 decoherence 49 protein encoded 49 coding genes 49 ostracods 49 helical 49 Mycobacterium smegmatis 49 tyrannosaurids 49 earliest tetrapods 49 endogenous retrovirus 49 ERK2 49 parthenogenetic 49 secrete proteins 49 globin 49 ribosomal RNA 49 telomerase enzyme 49 mouse embryo 49 Deinococcus 49 recessive mutation 49 azobenzene 49 sRNA 49 scanning tunneling microscope 49 chromosomal imbalance 49 single celled microorganisms 49 plant hormone auxin 49 Baleen whales 49 AFM cantilever 49 amino acid sequence 49 mouse ESCs 49 fruiting bodies 49 telomere maintenance 49 Cajal bodies 49 magnetic coil 49 polyploid 49 neuronal circuitry 49 mutated protein 49 myostatin gene 49 helicases 49 tetrapod 49 DNA double helix 49 morphogenetic 49 klotho 49 topoisomerases 49 hind wings 49 neural fibers 49 single celled algae 49 ellipsoid 49 primate genomes 49 bases adenine 49 Sticklebacks 49 caudal fin 49 macrocycle 49 apatosaurus 49 bacterial ribosome 49 lactase gene 49 auxin 49 bacterium Vibrio 49 cell nuclei 49 yeast prions 49 baker yeast 49 multicellular organism 49 colugos 49 dinoflagellate 49 selfing 49 operon 49 microfluidic chip 49 venom glands 49 phylogenetic tree 49 C. glabrata 49 spheroids 49 mimivirus 49 P. falciparum parasite 49 diamagnetic 49 SNAREs 49 protein complexes 49 herbivorous dinosaurs 49 transmembrane domains 49 granule cells 49 biomagnification 49 cnidarians 49 Newtonian mechanics 49 ferromagnets 49 sarcomeres 49 nematic 49 receptor protein 49 retrovirus 49 coccolithophores 49 sapiens 49 transgenic mice expressing 49 selenoproteins 49 hairlike structures 49 misfolded protein 49 Pol IV 49 Repenomamus robustus 49 Woese 49 demethylase 49 microtubule 49 gene encodes protein 49 forelimb 49 parasitic insect 49 Purkinje cell 49 Fig. 1A 49 yeast Saccharomyces cerevisiae 49 electromagnetically 49 nanoelectromechanical 49 membrane proximal 49 MHC molecules 49 mammalian brain 49 SNARE proteins 48 scutes 48 rubidium atom 48 LIS1 48 glycan 48 retinal neurons 48 mosasaurs 48 inherited maternally 48 helium atom 48 microbe 48 sister taxon 48 hydrolyze 48 DNA ligase 48 magnetosomes 48 punctate 48 perturbation theory 48 gastropod 48 EF Tu 48 transcriptomes 48 DNA demethylation 48 virions 48 mandibles 48 diatoms 48 ankyrin 48 Diptera 48 capillary tubes 48 antigenic drift 48 biominerals 48 single celled yeast 48 Syt IV 48 secretory pathway 48 atomic lattice 48 beryllium ion 48 dye molecules 48 Wnts 48 neurotrophin 48 pea aphid 48 chlorophyll molecules 48 Fig. 1b 48 phylogeny 48 immunoadhesins 48 trimer 48 lysine residues 48 enzymatic pathways 48 Confocal microscopy 48 bucky 48 microfilariae 48 Transposons 48 choanoflagellates 48 tiny capillaries 48 paramyxoviruses 48 FGF# 48 distantly related organisms 48 conodonts 48 mycobacterium 48 histone code 48 laminae 48 hydrophobic interactions 48 hemoglobins 48 vertebrates 48 Htt