Hydrozoan - Study guides, Class notes & Summaries

Sister group of Cnidaria - ANSWER Ctenophora About how many species in phylum cnidaria - ANSWER 9000 Cnidarias are dated over... - ANSWER 580 million years ago 4 classes of cnidarians - ANSWER Hydrozoa, Scyphozoa, Cubozoa, Anthozoa Cnidarians contain specialized cells no other animals have which is - ANSWER cnidocytes-typically housing stinging organelles called namatocysts Cnidarians are all aquatic and mostly - ANSWER marine What kind of symmetry do cnidarians have? - ANSWER ...

How do animals obtain nutrients? - Using directed movement to find food. Then ingest prey and digest it with their bodies. What are the traits that make animals unique (i.e., that are not seen in other organisms)? - Muscle and Nervous Cells What organism is the evolutionary ancestor of animals, and what evidence do we have for this relationship? - Choanoflagellates. They are identical to "collar cells" in sponges, which is the basal group of animals. What phylum is the basal (earliest evolv...

It has pertinent information for Bio 121 exam 3 about animals. Their symmetry, classifications under them, how they divide, if there is a coelom, what systems are in play, etc.