Final answer:
Cell A performs only one or a few functions, while cell B performs all of the organism's necessary functions.
Step-by-step explanation:
When comparing a cell from a unicellular organism (cell A) to a cell from a multicellular organism (cell B), the scientist will most likely see the following functional differences:
- Cell A performs only one or a few functions, as it is responsible for carrying out the necessary functions of the entire organism.
- Cell B performs all of the organism's necessary functions, as it is part of a larger organism that requires specialized cells to perform different functions.
Therefore, option A - Cell A performs only one or a few functions, while cell B performs all of the organism's necessary functions - is the correct answer.