Zoology Glossary Index:
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The control of more than one phenotypic characteristic by a single gene or set of genes. Pleiotropy occurs when a single gene controls multiple phenotypic traits.
Polymorphism occurs in a population of the same species when two or more different phenotypes exist.
The observable characteristics of an organism.
The biogeographic region that includes Europe, North Africa (north of the Sahara), northern Arabia.
"Occurring throughout the tropical regions of the world." (Source: Sibley)
"The replacement of feathers in only some of the body's feather tracts." (Source: Sibley)
"A member of the order Passeriniformes, often referred to as a songbird." (Source: Sibley)
A membrane of double-sided skin that forms the wing material in bats.
"Polychlorinated biphenyls, a class of chemicals used as lubricants and insulation materials and in printing ink." (Source: Sibley)
"Having tooth-like projections similar to the teeth of a comb." (Source: Sibley)
"General name for several small sandpiper species in the genus Calidris." (Source: Sibley)
"Associated with deep waters of the open ocean." (Source: Sibley)
"A mass of indigestible material including fur, feathers, and bones regurgitated by hawks, owls, herons, and other predatory birds." (Source: Sibley)
A type of radial symmetry, characteristic of echinoderms, in which body parts are arranged along five rays of symmetry.
The outermost layer of a snail's shell. Consists of conchin (a mixture of organic compounds), gives the shell color.
The evolutionary history or pattern of kinship relationships among various groups of organisms.
Third eye in the forehead of tuataras and many lizards that can register light intensity and may help to regulate body temperature.
Plankton are microscopic organisms that drift on the oceans' currents. They include organisms such as diatoms, dinoflagillates, krill, and copepods as well as the microscopic larva of crustaceans, sea urchins, and fish.
The shell or shield on the ventral surface (belly) of tortoises and turtles.
An organism that feeds on other organisms (prey).
"The source of the oil that a preening bird rubs on its feathers to maintain them in good condition; located on the lower back near the rump." (Source: Sibley)
Long snout or mouthparts.
Prokaryotes are organisms made up of cells that lack a cell nucleus or any membrane-encased organelles.
Terrestrial snails belong to a group within the Order Stylommatophora called the 'pulmonates'.
The mating of one female with more than one male during the course of a mating season.
The mating of one male with more than one female during the course of a mating season.
A form of polygyny or polyandry in which a member of one sex mates with more than one member of the other sex but the relationship is ephemeral and dissolves after mating as opposed to sustaining through time via the formation of a social bond.