Which statement about skeletons is true?
A) No skeleton consists entirely of cartilage.
B) Hydrostatic skeletons are not useful in the function of locomotion.
C) An advantage of an exoskeleton is that it can continue to grow throughout the life of the animal.
D) Unlike bones, external skeletons must remain flexible and therefore do not contain calcium carbonate crystals.
E) The two categories of bone are membranous bone and cartilage bone, based on how the bones are formed.

Question

Quizplus · Accepted Answer

The two categories of bone, membranous and cartilage bone, are indeed classified based on their mode of formation. Membranous bones develop directly from sheets of mesenchymal connective tissue, while cartilage bones form by replacing cartilage. This is a fundamental aspect of skeletal biology.

Which Statement About Skeletons Is True