Accepted Answer. The Dragon Scale can be found on wild Horsea, Seadra, Dratini, and Dragonair. The only hitch to your plan is that you can only find them after getting the National Dex and Dratini and Dragonair can only be found by using the Super Rod, behind the Waterfall, at Mt. Coronet.
Microtubules are conveyer belts inside the cells. They move vesicles, granules, organelles like mitochondria, and chromosomes via special attachment proteins. They also serve a cytoskeletal role. Structurally, they are linear polymers of tubulin which is a globular protein.
Some of these microtubules attach to the cell walls, others attach to individual chromosomes at their kinetochores. It's the spindle that pulls the chromosomes from the metaphase plate to the poles. The radiating microtubules of the spindle form asters (see figure left) â aster is Greek for star.