Which is true of cell differentiation? A. Tissues produce various stem cells.
B. Stem cells become different types of cells.
C. Unicellular organisms become multicellular

Because it was a dramatically big guy

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.