Which structure of a paramecium holds a "reserve copy" of all the cell's genes?

The structure of a paramecium that holds a "reserve copy" of all the cell's genes is the micro nucleus.
The micro nucelus is one of the two kinds of nuclei the paramecium has. The other is the  large ellipsoidal nucleus called a macronucleus. Every paramecium must have at least one small nucleus called a micronucleus. The micronucleus is a storage site for the germline genetic material of the organism.

Here is your answer:                                                                                                                                                                                                                                                   formula for volume: base*width*height=                                                                                                 5*2*10=100                                                                                   your answer is 100cm.