sphincter muscle, any of the ringlike muscles surrounding and able to contract or close a bodily passage or opening. ... There is also a sphincter in the eye, the sphincter pupillae, a ring of fibres in the iris that contracts the pupil in the presence of bright light...
Explanation:
Pura Wikipedia lele.. XD, BTW spelling mei 'h' missing Tha...!
<em>A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. ... There are over 60 types in the human body, some microscopically small, in particular the millions of precapillary sphincters.</em>
The correct answer is B) the fibers of the mitotic spindle.
Explanation:
The Taxol avoids the mitotic spindle to form, affecting directly the fibers of it. This, therefore, will stop the mitosis process, as the microtubules won't be forming properly.