For phylum Porifera, Class Calcarea  . Characteristics. List whether the organism is: a. Diploblastic or triploblastic (if applicable)  b. Deuterostome or protostome (if applicable)  c. Coelomate, pseudocoelomate or eucoelomate (if applicable)    2. Organ/system characteristics. Answer the following for each organism: a. How is their circulatory system?  b. Excretory/osmoregulation: How does the organism eliminate waste? What organs do they use?   3. Ecology. Describe/answer the following for each organism: a. Does it have a complete or incomplete digestive system? How does this animal feed? b. Identify any unique feeding structure • Be sure to use the correct terms to identify any unique feeding structure(s) used by the animal.

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Q: Please define and explain: Coelomates Acoelomates Pseudocoelomates

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Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.