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What is your favorite food?

What sound does a dog make?

Which of these chordates has a swim bladder?  

Enter your answers to the following in the space below: a) (.25 pt) Which type of heart is more efficient at supplying oxygen to a chordate’s body, a 3-chambered heart or a 4-chambered heart? b) (1 pt) Explain why the heart that you chose in part (a) is more efficient. Please limit your answer to one sentence. 

In module 3 we discussed multistage decision making.  Which of the following is a common technique for evaluating multistage decisions?

All chordates, at some point in their life cycle, share four hallmark characteristics.  One of these characteristics is a postanal tail.  Write two more of these characteristics shared by all chordates in the two blanks provided.  [1] [2]

What traits evolved in Chondricthyes that allowed them to become agile mobile predators of larger prey?

  Select the correct choice