It’s possible the other 90% was excreted ? Because a lot of the energy may not be useful to the mouse’s system. ... hmmm. That’s all I could think of, sorry I can’t be a better help ;w;
Yes, these are considered organs. The skin and the bones both fall under the definition of an organ.
The first thing a cell needs to do to divide successfully is to "B.increase its ratio of surface area to volume". This allows the cell to reach a "breaking point" at which it can divide into two separate cells.