Which type of white matter fiber tract connects the cerebrum to lower centers

Projection fibers

Explanation:

Subcortical white matter (medullary or semi-oval center) is composed of neurons extensions (nerve fibers) and glial cells. One of the fibers that are part of those extensions is the projection fibers (between cortex and structures outside the telencephalon). They are myelinated fibers that join cortical areas situated in different organs.

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation: