The most obvious difference between the brains of mammals and other vertebrates is in terms of size. On average, a mammal has a brain roughly twice as large as that of a bird of the same body size, and ten times as large as that of a reptile of the same body size. COUNT 3
QSN1 A mammal's brain is how many times larger than a birds relative to body size? ANS1 twice as large QSN2 A mammal's brain is how many times larger than a reptiles relative to body size? ANS2 ten times QSN3 The biggest difference between brains of mammals and other vertebrates is what? ANS3 size.