Which of the following is an example of a bone that is independent phylogenetically but is now fused with another bone?: (A) Trocanter of femur, (B) Tubercle of humerus, (C) Coracoid process of scapula, (D) Anterior tubercle of talus
Answer is C. Ativastic epiphysis is a phylogenetically independent bone which gets attached to the host bone secondarily to recieve nutrition. Eg are coracoid process of scapula, posterior tubercle of talus or trigonum. Classification of epiphysis : Pressure epiphysis : head of femur and humerus. Traction epiphysis : trochanter of femur and tubercle of humerus. Ativastic epiphysis : coracoid process of scapula, posterior tubercle of talus or trigonum.