Brain areas vary in size, matched for body mass, among different vertebrates.Choose the pair in which the first area varies the least dramatically and the second area varies the most dramatically.
A) Brainstem and cerebellum
B) Olfactory lobe and brainstem
C) Cerebrum and olfactory lobe
D) Brainstem and cerebrum
E) Olfactory lobe and cerebrum

Question

Quizplus · Accepted Answer

The brainstem varies the least dramatically because it controls basic life functions that are essential across vertebrates, making its size relatively consistent. The cerebrum varies the most dramatically because it is responsible for complex cognitive functions, which differ significantly among species, leading to a wide variation in size.

Brain Areas Vary in Size, Matched for Body Mass, Among