Related by context. Frequent words. (Click for all words.) 63 insects reptiles 61 birds reptiles amphibians 61 vertebrate animals 61 reproductive abnormalities 61 sexually dimorphic 60 rodents rabbits 60 frogs snakes 59 lobsters crabs 59 pteropods 59 protozoans 59 frogs lizards 59 Horseshoe crabs 59 reproduce asexually 59 penguins seals 58 elk bison 58 comparative anatomy 58 calcium carbonate shells 58 Whales dolphins 58 experimentally infected 58 mammals 58 amphibians reptiles 57 Darwin finches 57 Thoroughly cooking 57 metazoan 57 otolith 57 amphipods 57 fruitflies 57 auklets 57 echinoderms 57 gastrointestinal tracts 57 protists 56 isopods 56 methylation patterns 56 cone snails 56 Xenopus 56 toothed whales 56 proteins lipids 56 larval stages 56 predator prey relationships 56 hoofed mammals 56 insects spiders 56 decomposers 56 mammals reptiles 56 voracious predators 56 snakes frogs 56 By Laurie Kulikowski 56 planktonic 56 invertebrate animals 56 frogs turtles 56 BY VINCENT MAO 56 aquatic invertebrates 56 monotremes 55 placental mammals 55 reptiles amphibians 55 bioaccumulation 55 organogenesis 55 somatostatin 55 mitochondrial genomes 55 epithelial tissues 55 turtles frogs 55 mammalian 54 caribou moose 54 ichthyosaurs 54 organismal 54 aquatic insect 54 phyla 54 lizards snakes 54 Methylmercury 54 microbial ecology 54 SIV infected 54 soluble proteins 54 endothermic 54 dolphins wash ashore 54 Antarctic krill 54 nonhuman primate 54 By Jason Kaneshiro 54 Chlamydomonas 54 Zooplankton 54 macro invertebrates 54 birds mammals reptiles 54 bears mountain lions 54 eukaryote 54 plesiosaurs 54 frogs salamanders 54 physiologies 54 neural crest cells 53 Essential fatty acids 53 Aplysia 53 endocrine disruption 53 echolocate 53 Sea otters 53 daphnia 53 crappie bluegill 53 sexually reproducing 53 bacteria viruses fungi 53 terrestrial ecosystems 53 By RICK KRETZSCHMAR 53 pipefish 53 insectivores 53 hawks eagles 53 biogeochemical cycles