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WAEC Biology 2014 Question 11

Question 11

Support and Movement

The diagram is an illustration of a mammalian bone.
The function of the part labelled I is to

Diagram for this question
  1. A.fit into the glenoid cavity of the scapula.
  2. B.fit into the acetabulum of the pelvic girdle.
  3. C.support the lower arm.
  4. D.prevent the arm from bending backwards.
Show the answer and explanation

Answer: B (fit into the acetabulum of the pelvic girdle.)

Explanation

I is the rounded head of the femur, which fits into the acetabulum (socket) of the pelvic girdle to form the hip ball-and-socket joint.