What physical structure forms the basis of the shell in animals of the Order Testudines?
Answer
Fused ribs and vertebrae
The shell is an integrated part of the skeleton composed of fused ribs and vertebrae.
Related Questions
What Class are tortoises unequivocally classified under in the Linnaean hierarchy?Which Order encompasses all turtles, tortoises, and terrapins due to their bony shell structure?To which specific Family do the true tortoises belong?What is the defining habitat nature that separates tortoises from sea turtles and terrapins?How are the limbs of a tortoise typically adapted for their land-dwelling existence?What are the upper and lower sections of the Testudines shell respectively called?In many parts of the world, what term is colloquially used as an umbrella for any member of the Order Testudines?What physical structure forms the basis of the shell in animals of the Order Testudines?What type of water environment is the term 'terrapin' usually reserved for?In tortoises, the usually thicker and more rounded shell prioritizes defense over what structural characteristic?Which specific physiological characteristic, besides dome shape and land preference, defines a member of Family Testudinidae?Approximately how long ago does the Order Testudines date back in time?