Write a 3 page essay on a marine invertebrate phylum. Describe and discuss the physical and physiological adaptations for the following: food acquisition, predation avoidance, locomotion, reproduction, and development. Within each phylum, there may considerable morphological and physiological variations in the approach to these life problems. Discuss the variation among major subgroups within the phylum. Finally, what major characteristics of this phylum distinguish it evolutionarily from other phyla? The essay will be written in third person and have at least three outside sources. At least two sources must be peer reviewed journal articles. Please use the school online library to help in your research. The essay should also encompass a thesis statement, proper support in the following paragraphs, and end with a conclusion.