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Question

Which of the following is a tetrapod? a. a reptile b. a mammal c. a bird d. an amphibian

Answer

As a teacher, let me rephrase the following text while maintaining its original structure, but with some word modifications: Tetrapods are a classification of vertebrates that include mammals, birds, amphibians, and reptiles. Therefore A, B, C, and D are all correct. So, how are tetrapods classified? All current land vertebrates are part of the tetrapod order, including some extinct terrestrial animals that now live in water, such as whales, dolphins, seals, sea lions, sea turtles, and sea snakes. Vertebrates that do not have four legs are known as non-tetrapod vertebrates. The superclass Pisces consists of the class Chondrichthyes. Members of the class Osteichthyes, which is part of the superclass Pisces, includes lungfish, fish with lobbed fins, and fish with ray fins. Despite having only two legs, tetrapods also include humans and birds. Therefore, even if they have lost their "four feet" temporarily, all of these creatures are still tetrapods because they came from the tetrapod progenitor. To know more about tetrapods, visit brainly.com/question/13022270 #SPJ12.