Weegy: The subphylum Vertebrata consists of about 43,700 species of animals with backbones. (More)

Weegy: stingrays lamphreys trout User: Which vertebrates are endothermic? birds reptiles amphibians mammals bony fish Weegy: Which vertebrates are endothermic? Answer: birds, reptiles, amphibians and mammals User: Characteristics of most vertebrates' body structures include _____. radial symmetry bilateral symmetry coelomates acoelomates four levels of cell organization (cells, tissues, organs, organ systems) asymmetry psuedocoelomates Weegy: Characteristics of most vertebrates' body structures include: radial symmetry, bilateral symmetry, cells, tissues, organs, and organ systems is your answer. User: With the exception of echinoderms, invertebrates are _____; chordates, echinoderms, and vertebrates are _____. soft-bodied; hard-bodied acoelomates; coelomates protostomes; deuterostomes radially symmetrical; bilaterally symmetrical Weegy: The answer is: (c) Protostomes; deuterostomes With the exception of echinoderms, invertebrates are "protostomes" chordates, echinoderms, and vertebrates are "deuterostomes". User: Animals with a special rod or notochord are called _____. vertebrates chordates invertebrates Weegy: vertebrates User: Amphibians live in water and on land. True False (More)