The Following Questions Refer to the Description Below

The following questions refer to the description below.
Terry catches a ray-finned fish from the ocean and notices that, attached to its flank, there is an equally long, snakelike organism. The attached organism has no external segmentation, no scales, a round mouth surrounded by a sucker and two small eyes. Terry thinks it might be a marine leech, a hagfish, or a lamprey.
-The endoskeletons of most vertebrates are composed of calcified

A) cartilage.
B) silica.
C) chitin.
D) dentin.
E) enamel.

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