1.   Into which two groups are marine animals broadly classified?

verterbrates and invertebrates

2.  What phylum do we belong to?

chordata

3.  What four broad categories can vertebrates fall into?

fish, birds, reptiles, and mammals

4.  What two characteristics of water do fish have to overcome?

viscosity and density

5.  What adaptations do fish have to accomodate these physical challenges?

streamlining, small scale size, fins tucked in

6.  What is light created by biological organisms called?

bioluminescence

7.  What are examples of defense mechanisms found in fish?

schooling, coutershading, chamoflauge, spines

8.  What are examples of marine reptiles?

turtles, alligators, sea snakes

9.  What are characteristics of marine birds?

wide wingspans, streamlined body, hollow bones, feat further back

10.  What are some characteristics of tube nose birds?

keen ability to smell, ability to stay aloft for long periods of time, limited need for water

11.  What are three groups of marine mammals?

cetacea, carnivora, sirenia

12.  What are two categories of whales?  How are they distinguished?  Which are the largest?

balleen and toothed whales; balleen whales, toothed whales have teeth; Balleen whales are the largest

13.  What do most balleen whales eat?

krill