Question 10 of 14 in this topic
Difficulty: MediumTransitions
A turtle shell appears external to the animal, protecting its body like armor. _______ the shell is often incorrectly assumed to be an exoskeleton, a rigid outer casing like that of a crustacean or an insect, when in fact it is an endoskeleton, a part of the turtle’s internal bone structure, more akin to a spine or a pair of ribs.
Which choice completes the text with the most logical transition?
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