Correction+the+review+of+Invertebrates

=Characteristics of Cnidarians= ... **1.- Cnidarians are animals with RADIAL SYMMETRY** **2.- Cnidarians DO NOT HAVE SKELETON** **3.- POLYP FORM is ASEXUAL and they DO NOT MOVE** **4.- MEDUSA FORM is SEXUAL and FREE-SWIMMING** **5.- Cnidarians are AQUATIC ANIMALS** **6.- Cnidarians stinging cells are called CNIDOCYTES** **7.- Cnidarians are classified according to STAGE IS DOMINANT IN THE LIFE CICLE OF EACH SPECIES** **8.- Corals ONLY HAVE FORM POLYP** **9.- In cnidarian species that have polyp and medusa **forms**, the reproduction IS BOTH SEXUAL AND ASEXUAL** **10.- About 10.000 SPECIES ARE KNOWN**