- (B) As animals evolved and became more advanced, their brains typically became larger, relative
to the size of their bodies. However, the part of the brain that has increased the most in size and a
part that is not even present in many animals is the cerebral cortex. This change makes sense given
that the cortex is the seat of high-level thought. The pons and reticular formation are both part of
the brainstem, an older part of the brain. The forebrain includes the cortex as well as less
advanced structures like the hypothalamus.
marvins-underground-k-12
(Marvins-Underground-K-12)
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