A single cell becomes many cells. Each cell has a different function. Many cells combine to form one cell. All the cells have the same function.
I gave my students this multiple choice question: Which statement best describes the development of a human embryo?

Only one answer is correct among these 4 choices:
- A single cell becomes many cells.
- Each cell has a different function.
- Many cells combine to form one cell.
- All the cells have the same function.

Could you tell me which one is correct?

A single cell becomes many cells.