Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several herbivorous gastropod varieties. First, the teacher conditioned the water. Knowing that saltwater aquaria can be quite a hassle, the teacher proceeded stepwise. Host symbionts with colorful photosynthetic pigmentsĪn elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Healthy corals are brightly colored because they GASTROVASCULAR CAVITY The gastrovascular cavity, characterized by a single opening, is the digestive compartment of cnidarians. Which of the following is a characteristic of cnidarians? One should expect to find cilia associated with the feeding apparatus of PROIFERA Evidence that supports this includes the lack of true tissue in sponges and the close similarity between choanocytes and choanoflagellates. The animal phylum most like the protists that gave rise to the animal kingdom is _.
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