Q. Which of the following features is not found in Aves
A) Preen glands on tail
B) Crop and a gizzard
C) Air cavities in bones
D) Teeth inside the beak
Explanation
Aves lack teeth but have oil glands called preen glands present in their tail. They have a crop and a gizzard which aids in digestion Bones have air cavities that leads to reduce weight of the bird and makes flight possible among birds
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.