Q. Bone marrow is absent in
A) Reptiles
B) Amphibians
C) Aves
D) Mammals
Explanation
Bone of the birds like ostrich, owl are hollow and known as pneumatic, i.e., bone marrow is absent in bones of birds. This is the adaptation for aerial life of birds.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.