Enter your Name:   Enter your E-mail Address:  Define the following terms: 01a. Adaptation 01b. Baleen 01c. Echolocation 01d. Behavior 01e. Delayed implantation 02. During the time of year when sea turtle eggs hatch, the population of predatory birds near the shoreline tends to increase. Why? 03. What does the salt gland do for marine birds? 04. How is the adaptation of a laterally flattened tail helpful to marine iguanas and sea snakes? 05. Where are you more likely to find marine reptiles: warmer or colder climates? 06. Pelicans and terns both dive into the water to catch their prey. Pelicans are better swimmers, however. Why? 07. A person finds a very large jawbone washed up on the beach. It is so large that it must be from a whale. How can the person tell if it was from a baleen whale or not? 08. The largest animals on earth, the baleen whales, feed on the tiniest of organisms, the plankton. How can a diet of such small organisms be beneficial to support such huge organisms? 09. Which marine mammal order contains animals that spend their entire lives in the water: Sirenia, Pinnipedia, or Carnivora? 10. Would you expect to find a melon on a toothed whale or a baleen whale? 11. Consider the echolocation system of a dolphin. Explain how the clicks are generated in the dolphin, as well as how the echoes are received and processed. Include the major anatomical structures related to the echolocation system in your answer. 12. Why do dolphins not get the bends when they dive deeply? 13. You see what might be a seal or a sea lion swimming in the water. What can you look for to determine whether it is a seal or a sea lion? 14. What detail of cetacean birth minimizes the risk of the calf drowning? 15. A migratory marine mammal does not experience delayed implantation. What is the approximate gestation period for its young?