Définition : overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
Définition : muscular waves propelling an animal over a mucus layer overlaying the substrate; alternating regions of muscular contraction and expansion create traveling waves that shear the mucus, resulting in translation of the animal.
Définition : Component found in mineralized skeletal tissue, (a specialized form of biogenic tissue in which the extracellular matrix is mineralized, and which functions in mechanical and structural support.)
Définition : Capable of creating a new organism by combining the genetic material of two gametes, which may come from two parent organisms or from a single organism, in the case of self-fertilizing hermaphrodites.
Définition : Relative to pinhole eyes, lens eyes have greatly improved resolution and image brightness. The lens converges incoming rays of light, thereby reducing the angle over which each photoreceptor receives light, and forming an image focused on the retina. Most lens eyes have "accommodation"; they can focus an image either by physically moving the lens toward or away from the retina or by using eye muscles to adjust the shape of the lens.
Les environnements dans lesquels beaucoup d’espèces de Ptychatractidae Stimpson 1865 sont connues pour y vivre. Sélectionner un environnement pour voir sa liste de contrôle d’espèces de Ptychatractidae Stimpson 1865.
Habitats de Ptychatractidae Stimpson 1865
Les environnements dans lesquels beaucoup d’espèces de Ptychatractidae Stimpson 1865 sont connues pour y vivre. Sélectionner un environnement pour voir sa liste de contrôle d’espèces de Ptychatractidae Stimpson 1865.
