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Nomenclature cards are a good way of teaching the parts of an animal. Some have more than one pigment type; for example, one form of hemoglobin for “normal” condi- tions and another form that stores oxygen and releases it during periods of stress. Leuconoid or- ganization is typical of most calcareous sponges and all members of the Demospongiae. The next divi- sion is latitudinal and unequal, giving rise to micromeres on the concave side of the macromere plate.
Pages: 92
Publisher: University of California Press; First Edition edition (December 1975)
ISBN: 0520095235
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