Q. Which one of the following pairs of structures is correctly matched with their correct description? Structures – Description
A) Tibia and fibula – Both form parts of knee joint
B) Cartilage and cornea – No blood supply but do require oxygen for respiratory need
C) Shoulder joint and elbow joint – Ball and socket type of joint
D) Premolars and molars – 20 in all and 3-rooted
Explanation
[Solution from source] Cartilage and the cornea are avascular tissues: they have no blood vessels, yet their living cells still respire and obtain oxygen by diffusion (from perichondrium, aqueous humour and air). The knee joint is formed by the femur, tibia and patella; the fibula does not take part. The elbow is a hinge joint, not ball and socket, and premolars plus molars (8 + 12 = 20) are not all three-rooted. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.