Which of the following is not true?
a. microtubules require atp hydrolysis for polymerization of dimers
b. microtubules have inherent polarity, plus and minus ends
c. microtubules are made of î±-î² tubulin dimers
d. free cytoplasmic microtubules have 13 protofilaments organized into the tubule
e. microtubules can be used to transport materials within cells

The following which is not true is letter A.

Explanation: Because microtubules require GTP hydrolysis.  The process  requires energy from GTP hydrolysis.  It occurs at the beta- tubulin subunit after incorporation of the tubulin dimer into the microtubule lattice.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."