1. Cetaceans are descended from land mammals who:
a. Had horns
b. Were closely related to sharks
c. Had hooves
d. Had very large brains
2. About 35 million years ago the early versions of modern dolphins:
a. Became larger in body size than the previous group of cetaceans
b. Developed more formidable teeth than their predecessors
c. Still lived on land part of the time
d. Started to echo-locate
3. Dolphins have meta cognition. This means:
a. They can understand an artificial language
b. They can think about their own thoughts and report on them
c. They can imitate
d. They can use echolocation to see inside of prey
4. The Dolphin Sponge Club:
a. Is an example of cultural tool use
b. Is a group of dolphin researchers in Florida
c. Is a group of captive dolphins who have learned the names for different colored sponges
d. Is a group of dolphins who make sponges from man-made plastic items found in the ocean
5. A mass stranding of dolphins:
a. Is due to the poor navigational abilities of many dolphin species
b. Is often a result of the loyalty a group has for one sick or injured individual
c. Is a cultural tradition
d. Represents the dolphins’ desire to go back to a terrestrial lifestyle
6. What are some of the reasons you can think of for why dolphin ancestors adopted an aquatic lifestyle?