Final answer:
Cells taken from a tumor can be utilized for the cultivation of viruses and bacteriophages, as they may become immortal cell lines that can be cultured in vitro indefinitely with the right conditions. Immortal cell lines derived from tumors are significant for scientific research and industrial applications.
Step-by-step explanation:
The subject of the question involves the cultivation of virus and properties of cells taken from a tumor. In the context of the given information, cells taken from tumors can be used to grow viruses. For instance, flat horizontal cell culture flasks can be utilized for this purpose in vitro. Bacteriophages can be grown in the presence of a bacterial lawn in a soft agar medium. Conditions allowing, these cells extracted from tumors have significant importance as they may become immortal cell lines, which in principle can be cultivated indefinitely in vitro under proper conditions, provided the medium is replenished when needed. These immortal cell lines can be used for various scientific purposes, such as the production of vaccines, antibodies, and the study of viral infections.
On the part of the question addressing whether tumor cells die after 50 divisions, this refers to normal somatic cells experiencing senescence or the so-called Hayflick limit. However, tumor-derived or transformed cells can bypass this limit and continue to divide. Therefore, statements regarding cells dying after a specific number of divisions do not apply to transformed tumor cells or established immortal cell lines such as those used for in vitro studies and research.