Pinnipedia includes which marine mammals?

Study for the IB Marine Science Standard Level Exam. Prepare with interactive quizzes and in-depth explanations. Use our resources to excel in your marine science knowledge!

Multiple Choice

Pinnipedia includes which marine mammals?

Explanation:
Pinnipedia are fin-footed marine mammals with flippers adapted for swimming, and they include seals, sea lions, and walruses. These three groups—the true seals (Phocidae), the eared seals like sea lions (Otariidae), and the walrus (Odobenidae)—are the living members of pinnipeds. The other options describe whales and dolphins (Cetacea), manatees and dugongs (Sirenia), or otters and polar bears (not pinnipeds), so they don’t belong to Pinnipedia. Therefore, the choice listing seals, sea lions, and walruses is the correct one.

Pinnipedia are fin-footed marine mammals with flippers adapted for swimming, and they include seals, sea lions, and walruses. These three groups—the true seals (Phocidae), the eared seals like sea lions (Otariidae), and the walrus (Odobenidae)—are the living members of pinnipeds. The other options describe whales and dolphins (Cetacea), manatees and dugongs (Sirenia), or otters and polar bears (not pinnipeds), so they don’t belong to Pinnipedia. Therefore, the choice listing seals, sea lions, and walruses is the correct one.

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