Final answer:
Red blood cells have a standard structure and function in humans, so Mr. Stamos's and Nikoleta's red blood cells would look similar.
Step-by-step explanation:
The appearance of Mr. Stamos's red blood cells and Nikoleta's red blood cells would be similar because red blood cells have a standard structure and function in humans. The size, shape, and structure of red blood cells are highly conserved, meaning they are relatively constant among individuals of the same species. Therefore, a picture of Mr. Stamos's red blood cells and Nikoleta's red blood cells would show similar characteristics.