Uncover valuable information and solutions with IDNLearn.com's extensive Q&A platform. Get the information you need from our community of experts who provide accurate and comprehensive answers to all your questions.

In terms of the evolution of the vertebrate brain, one trend that is evident, especially if one compares the brains of amphibians with those of mammals is the complete covering of the __________ by the __________:
a. brain/spinal cord.
b. midbrain/forebrain.
c. midbrain/hindbrain.
d. fourbrain/fivebrain.
e. none of the above.