1 In the cytoplasm, the mitotic spindle, consisting of microtubules and other proteins, forms between the two pairs of centrioles as they migrate to opposite poles of the cell. 2  The nuclear envelope disappears at the end of prophase. 3  This signals the beginning of the substage called prometaphase.
  Percussion Family. The Timpani is struck by mallets ... any instrument that requires a percussive touch is a member of this family ...surprisingly enough, and a little â¦ known fact, the Piano is also a member of the Percussion Family ... a key must be struck to produce a tone!!5 people found this useful.he Timpani is struck by mallets ... any instrument that requires a percussive touch is a member of this family ...
Chasmosaurinae is a subfamily of Ceratopsid dinosaursâ Torosaurus and Triceratop s are two well-known relatives of the family Chasmosaurinae. Being of a âtribeâ (Triceratopsini) of genera, the genus is considered to be at the pinnacle of development for that family.