21. Why do some whales have teeth and others baleen ? 22. The teeth or baleen in the upper jaw sit exclusively on the maxilla. 23. The baleen of baleen whales consists of long, fibrous strands of keratin. 24. The baleen of baleen whales consists of long, fibrous strands of keratin. 25. Baleen whales are largely monogamous within each reproductive period.26. Mysticetes are also known as baleen whales because of the presence of baleen. 27. Mysticetes are also known as baleen whales because of the presence of baleen . 28. The fin whale, the fastest among baleen whales, can travel at. 29. This allows baleen whales to detect chemicals and pheromones released by their prey. 30. Unlike most other baleen whales, it has rarely been subject to exploitation.
