التعريف: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
التعريف: An irregularly shaped hill or mound composed of sorted or stratified sand and gravel that is deposited in contact with the glacial ice. It can have an irregular shape
التعريف: An organism that is dependent at least for part of its life cycle on dead or decaying wood or on other organisms that are themselves dependent on this resource.
التعريف: A group of species that exploit the same food resources, and/or use the same feeding or foraging methods. http://en.wikipedia.org/wiki/Guild_(ecology)
