Question

whales are classified into two major groups, depending on whats inside their mouths. toothed whales have teeth that they use to catch food from the ocean. but instead of teeth, baleen whales have plates that filter water out of their mouths and trap krill inside. the physical features and habits of these whales differ in other respects, too. baleen whales have symmetrical skulls, which means their skulls are balanced in size and shape. toothed whales, however, have asymmetrical skulls. baleen whales have two blowholes and large tongues, while toothed whales have only one blowhole each and small tongues. toothed whales live in complex social groups and use echolocation, a process of using sound waves to hunt and navigate. by contrast, baleen whales live in small groups and most likely do not use echolocation.

Explanation:

• For "Have symmetrical skulls": The text states "Baleen whales have symmetrical skulls", so check the box for Baleen whales.
• For "Have one blowhole": The text says "Toothed whales have only one blowhole each", so check the box for Toothed whales.
• For "Have large tongues": The text mentions "Baleen whales have two blowholes and large tongues", so check the box for Baleen whales.
• For "Live in small groups": The text indicates "baleen whales live in small groups", so check the box for Baleen whales.
• For "Use echolocation": The text states "Toothed whales...use echolocation", so check the box for Toothed whales.

Answer:

• Have symmetrical skulls: Baleen whales
• Have one blowhole: Toothed whales
• Have large tongues: Baleen whales
• Live in small groups: Baleen whales
• Use echolocation: Toothed whales