Final answer:
Karyoplasm, also known as nucleoplasm, is the viscous fluid within the nuclear envelope that plays a crucial role during mitosis, the cell nucleus division process.
Step-by-step explanation:
The karyoplasm is another term used to refer to nucleoplasm, which is a viscous fluid contained within the nuclear envelope of a eukaryotic cell. The nucleoplasm is similar to the cytoplasm found outside the nucleus, and it houses the chromatin and the nucleolus. During the process known as karyokinesis, or mitosis, this nucleoplasm plays a crucial role in the division of the cell nucleus. Mitosis includes phases like prophase, prometaphase, metaphase, anaphase, and telophase that are essential for the equal distribution of the cell's genetic material into the two daughter cells.