15 degrees is the difference between them in celsius
All living things are made of cells, so yes, mushrooms are made of cells. :)
Substitution mutation is when a single base pair in a strand of DNA is replaced. This can cause an early stop amino acid, or the protein could change slightly, or the protein could be unchanged completely due to there being multiple base pairs to make an amino acid.
Is they are random changes I believe they should be mutations
