Cells in many-celled organisms a all have the same structure. b are often quite different from one another. c all look the same. d are the same size in every part of the organism.

B) are often quite different from each other

Think, do you think a lung cell looks and does the same as an eye cell? No, they do not.

All look the same because if you look under a microscope it's all the same colors shapes and sizes

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.