Final answer:
Pores in the nuclear membrane permit the passage of ions, molecules, and RNA between the nucleoplasm and the cytoplasm.
Step-by-step explanation:
The function of pores in the nuclear membrane is to permit the passage of ions, molecules, and RNA between the nucleoplasm and the cytoplasm. These protein-lined pores act as channels, allowing material to move in and out of the nucleus. This is essential for various cellular processes, such as gene expression and protein synthesis.