Best Answer: B) Corpus callosum which is a wide, flat bundle of neural fibers beneath the cortex in the eutherian brain at the longitudinal fissure. It connects the left and right cerebral hemispheres and facilitates interhemispheric communication. It is the largest white matter structure in the brain, consisting of 200â250 million contralateral axonal projections.
harebrained â(comparative more harebrained, superlative most harebrained) ( 1 of an idea or plan etc) absurd, foolish or stupid. ( 2 of a person) frivolous and silly; featherbrained or scatterbrained.
The squiggly part of the brain, called the grey matter or neocortex, is not the same all the way through like a rubber ball would be. It is a thin layer of brain around water (cerebrospinal fluid) and nerve cells. So the brain of small-brained animals is more like the surface of a tennis ball. How could that brain get bigger? One way is by growing bigger, like from a tennis ball to a kickball.