Here's why:

* Cilia are hair-like projections that help with movement.

* Both plant and animal cells can have cilia. For example:

* Animal cells like those lining the respiratory tract use cilia to move mucus and debris.

* Some plant cells also have cilia, though it's less common. For example, some algae use cilia for locomotion.

So, the presence of cilia doesn't definitively tell you if a cell is plant or animal. You'd need to look at other characteristics, such as:

* Cell wall: Plant cells have a rigid cell wall, while animal cells don't.

* Chloroplasts: Plant cells have chloroplasts for photosynthesis, while animal cells don't.

* Vacuoles: Plant cells usually have a large central vacuole, while animal cells have smaller vacuoles.