Answer:
the formation of the mitotic spindle.
Explanation:
According to various scientific and medical research studies, Taxol serves as a means to restrain the vigorous behavior of various microtubules. This thereby causes multipolar mitotic spindles.This actions from Taxol often lead to a loss of mitotic spindle formation.
Hence, in this case, it can be concluded that Taxol must affect "the formation of mitotic spindle."