nictitating membrane
51Tiger shark — For other uses, see Tiger shark (disambiguation). Tiger shark Temporal range: 50–0 Ma[1] …
52Carcharhiniformes — Taxobox name = Ground sharks image caption = Blacktip reef shark Carcharhinus melanopterus regnum = Animalia phylum = Chordata classis = Chondrichthyes subclassis = Elasmobranchii ordo = Carcharhiniformes ordo authority = Compagno, 1977… …
53Hexanchiformes — Taxobox name = Hexanchiformes image width = 250px image caption = Frilled shark, Chlamydoselachus anguineus regnum = Animalia phylum = Chordata classis = Chondrichthyes subclassis = Elasmobranchii ordo = Hexanchiformes ordo authority = de Buen,… …
54Squaliformes — Taxobox name = Squaliformes image width = 250px image caption = Gulper shark, Centrophorus granulosus regnum = Animalia phylum = Chordata classis = Chondrichthyes subclassis = Elasmobranchii ordo = Squaliformes ordo authority = Goodrich, 1909… …
55Vestigiality — The human vermiform appendix is a vestigial structure; it no longer retains its original function. Vestigiality describes homologous characters of organisms that have seemingly lost all or most of their original function in a species through… …
56Lamniformes — Taxobox name = Lamniformes image width = 250px image caption = Great white shark, Carcharodon carcharias regnum = Animalia phylum = Chordata classis = Chondrichthyes subclassis = Elasmobranchii ordo = Lamniformes ordo authority = Berg, 1958… …
57Goblin shark — Temporal range: 40–0 Ma …
58Haw — may refer to: * Haw, the nictitating membrane on the eyes of some animals * HAW, the ISO 639 language code for the Hawaiian language * Haw and gee, directional commands to a draft animal * Haw wars (1865 1890), fought against Chinese quasi… …
59Masked Lapwing — Vanellus miles novaehollandiae Conservation status …
60Eyeblink conditioning — (EBC) is a form of classical conditioning that has been used extensively to study neural structures and mechanisms that underlie learning and memory. The procedure is relatively simple and usually consists of pairing an auditory or visual… …
