What is the difference between cartilage and bone?

Correct Answer: B

Rationale: Cartilage is flexible and rubbery (e.g., ear), while bone is rigid and firm due to mineralization. Bone isn’t primitive (both are ancient), and both are internal, making 'Cartilage is rubbery, and bone is firm' correct.

Correct Answer: C

Rationale: The vomer is a single, midline facial bone forming part of the nasal septum. Maxillae, lacrimals, and nasals are paired bones, while the vomer is unpaired, making it the correct choice.

Correct Answer: C

Rationale: Paranasal sinuses are air-filled cavities in the frontal, ethmoid, sphenoid, and maxilla bones, reducing skull weight and resonating sound. The vomer, a thin midline bone in the nasal septum, lacks a sinus.

Correct Answer: D

Rationale: The os coxa (hip bone) comprises the ilium, ischium, pubis, acetabulum (socket), and obturator foramen. The capitulum is a feature of the humerus, not the os coxa.

Correct Answer: A

Rationale: The sphenoid bone lacks a styloid process. The temporal bone has a styloid process (near the ear), and the ulna and radius have styloid processes at their distal ends in the wrist.