What is an Animal? Describe the increasing complexity of (1) poriferans, (2) cnidarians and (3) platyhelminths Include in your answer:

a. the definition of “animal” that uniquely defines animals as different from all other organisms and how well sponges fit this definition (or not)

b. a description of food capture and digestion of each of the three groups

c. compare and contrast the organ systems of cnidarians and platyhelminths d. a description of the sensory structures of each group

Although there is a minimum word count of 2500 words for this essay, you will find that it is likely going to require more than the minimum to fully answer the question. You must list all of your sources (at least five) in a References section at the end of the essay. You may not copy or quote from any source. All information must be re-written in your own words. Essays must be submitted by the due date and time for full credit.

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