التعريف: overall repetitive or reflective pattern in the body of one individual of this taxon. eg: bilateral symmetry, rotational symmetry, radial symmetry
التعريف: The fourth post-naupliar life stage of a copepod. All copepodid stages are characterised by two pairs of unsegmented swimming appendages, and an unsegmented "hind-body" comprising the thorax and the abdomen. (http://en.wikipedia.org/wiki/Copepodid#Copepoda)
التعريف: In population biology, the generation time is a quantity that reflects the average time between two consecutive generations. Reciprocal of Generation Frequency
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)
