Which class includes snakes, lizards, and turtles?

Which class includes snakes, lizards, and turtles?

• A. Reptilia
• B. Sirenia
• C. Polychaeta
• D. Porifera

Answer: (A)

Classification by vertebrate class groups animals that share key features. Snakes, lizards, and turtles are all reptiles, a class of vertebrates that are typically ectothermic, have dry, scaly skin, and lay amniotic eggs. These traits unite them in Reptilia, setting them apart from the other groups listed. Sirenia are mammals (aquatic, with mammary glands), Polychaeta are segmented worms, and Porifera are sponges, so they do not belong to the reptile class.

Classification by vertebrate class groups animals that share key features. Snakes, lizards, and turtles are all reptiles, a class of vertebrates that are typically ectothermic, have dry, scaly skin, and lay amniotic eggs. These traits unite them in Reptilia, setting them apart from the other groups listed. Sirenia are mammals (aquatic, with mammary glands), Polychaeta are segmented worms, and Porifera are sponges, so they do not belong to the reptile class.