Here's why:
* Specialization: Multicellular organisms have evolved to have different types of cells, each specialized to perform a specific function. This is called cell differentiation.
* Example: Muscle cells are long and fibrous for movement, nerve cells have long axons for transmitting signals, and skin cells are flat and tightly packed for protection.
* Structure reflects function: The structure of a cell directly relates to its function.
While all cells share some basic features (like a cell membrane, cytoplasm, and DNA), their specific structures and organelles vary widely depending on their role in the organism.
