5. What are the fins of fish compared to?
b. bones and disc
a. arms and legs
d. reptile fins
c. spinal cord
6. What does "It" refer to?
b. plastic pipe
a, backbone
d. A and e are correct.
c. spinal column
7. How is the phrase represented by used in the passage?
a. To symbolize the flight of birds
b. To talk about circular shaped disc
c. To show how advanced human limbs are
d. To show what type of limbs humans have
8. What is the meaning of distinct sections as used in the passage?
a. The section of bones to help to breathe.
b. The discs are separated into different subsections.
c. The spinal cord and vertebrae are important body part.
d. When bones break, they separate into five distinct pieces.