<span>Microtubules form from dimers of Alpha and Beta subunits that polymerize into a hollow tube. Alpha and beta subunits refer to tubulin. There are things that can stop this from happening, and when one of these events occurs, de-polymerization is called "catastrophe".</span>
Answer:
C
Explanation:
pls give brainliest since i answered first
The ice stays on top because it is sold which means it is less dense than liquid (water)
