Echinoderms have a water vascular system, which is a key trait of this phyla. Select the features of this system (multiselect). a) hydrostatic skeleton b) ampulla on the inside of the body c) tube-like podium projecting on the inside d) series of branching, fluid-filled tubes and chambers e) endoskeleton f) ampulla on the outside of the body g) tube-like podium projecting on the outside h) opening to the exterior

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Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.