Are all type of call the same size and structure? Explain why

If you mean cell, no they're not. They have different sizes and structures.

Explanation:

One reason is that cells are adapted for their jobs. Example plant cells are adapted to make their own food by photosynthesis, thus their structure may be different from other cells that don't make their own food like animal cells. Plant cells also have cell wall which gives them a regular shape, while animal cells have no cell wall and thus they have irregular shape.

the scientific method.