5. What are the fins of fish compared to? / b. bones and disc / a, arms and legs / c. spinal cord / d. reptile fins // 6, What does"It" refer to? b. plastic pipe a. backbone d. A and c are correct. e, 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 To show how advanced human limbs are d, To show what type of limbs humans have What is the meaning of distinct sections as used in the passag a. The section of bones to help to breathe. b. The discs are separated into different subsections. e. The spinal cord and vertebrae are important body part When bones break, they separate into five distinct pi