--- are tiny structures that make up all living things and are the smallest units able to perform life function. Unable to be seen with the naked eye, cells are . Some organisms such as amoeba and --- are single cell --- . Although we cannot see with our eyes alone, scientists can grow cultures in a lab or observe models that are enlarged or not to --- .

are tiny structures that make up all living things and are the smallest units able to perform life function Unable to be seen with the naked eye cells are Some class=