JAMB - Biology (2006 - No. 44)
In the diagram, A unique characteristic that distinguishes the class of vertebrates represented from other vertebrates is the presence of
two pair of limbs
scales on the lower legs
a pair of wings
a covering of feathers
توضيح
The unique feature that distinguishes chickens (and birds in general) from other vertebrates is their covering of feathers. Feathers provide insulation and temperature regulation, Support and protection during flight, Camouflage and display for communication and mating.
Feathers are a characteristic that sets birds apart from other vertebrates, such as mammals, reptiles, and amphibians.