Feathers are modified scales and their original function may have been thermoregulation or advertisement.

Many coral reef fishes have laterally compressed bodies, which may help them to avoid predators. The predator may lose track of its prey when these laterally compressed fishes quickly turn their bodies so that they point their narrow anterior or posterior profiles to the predator.

Which of the following is a function of the lateral line?

Find the derivative using differentiation rules 8.  

Select the two correct answers. The receptor for hearing is called the ________. When a sound is high pitched you know the soundwaves have __________.

Answer the following questions based on the photographs below.  Label your answers with the letters of each question.  Spelling counts. Be very specific. A. What is the name and the function of the structures shown here? B.  Is this a male or a female? How do you know? C. Is this a male or a female? How do you know? D. Is this a mysticete or an odontocete?  How do you know? E. This is a dorsal view of the cranium of a cetacean. Is this a mysticete or an odontocete?  How do you know?

Disruptive coloration refers to those color patterns that break the outline of the animal (e.g., stripes). Predators may not be able to detect prey with such coloration because they typically focus on the outline of their prey before striking.

10.  Below is an amino acid sequence that codes for both an α-helix and something else.  Copy this sequence onto your notebook paper.         …T N S E D K K R K K N E A L R L A M K F I N F L A R…          a) Draw a box around the region that codes for the α-helix.  Describe two structural features of this region that make it want to be an α-helix.  (6 pts)         b) Circle the region that codes for the “something else”.  What does this code for?  Describe two structural features of this region that helped you identify it as such.  (6 pts)      

True or False. You can visit your instructor in person during her office during office hours. 

True or False. You can make up a discussion board post if you are absent.