Q. Which of the following is true of Aves?
A) They are poikilotherms and have a three chambered heart
B) Tiny pebbles eaten by some birds and are used in crushing
C) They have 10 pairs of cranial nerves
D) All of the above
Explanation
Aves have two additional chambers to the alimentary canal: the crop and the gizzard. Birds eat tiny pebbles that lodge in the gizzard and help the muscular gizzard in crushing food. Birds have 12 pairs of cranial nerves
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.