What makes matelloids a group of there own

What must happen before a body cell can begin mitotic cell division

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

Tell me the iupac name of the following compounds: