What is the word for a sample treated like other experimental groups except variable is not applied?

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

How are isotopes of the same chemical element alike? how are they different?

Sugar is dissolved in water. which is the solute? sugar neither both water