Final answer:
The two cells with long thread-like filaments are likely to be ciliated or flagellated cells, while the cup-shaped cell could be a specialized cell type.
Step-by-step explanation:
From the information provided, it can be determined that the two cells with long thread-like filaments are likely to be either ciliated cells or flagellated cells. Cilia are hair-like structures that beat rhythmically and move substances across the cell surface, while flagella are longer appendages specialized for cell locomotion. The cup-shaped cell could be a specialized type of cell, such as an egg cell or a reproductive cell, due to its distinct shape.