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 ...
A major family of instruments is the brass instrument family. It includes the trumpet, tuba, trombone, French horn, bugle, and cornet, just to name a few.lus they can be played and carried while marching. Smaller groups of brass instruments may be used in rock music, mariachi bands, and smaller ensembles. These generally use instruments like the trumpet, trombone, and saxophone (which is really a woodwind).