A) reptiles
B) amphibians
C) aves
D) mammals
Correct Answer: C
Solution :
Bone of birds like ostrich; owl are hollow and known as pneumatic ie, bone marrow is absent in bones of birds. This is the adaptation for aerial life of birds. Reptiles, amphibians and mammals have bone marrow. Haversian canals are present in bone of mammals.
You need to login to perform this action.
You will be redirected in
3 sec
