Question

part 2
what is the best justification for the correct answers you chose in part 1?
g1 of interphase causes the enzymes that recognize cancer cells to shut down, allowing cancer to grow.
dna replication multiplies the dna of cancer cells uncontrollably.
tumors are caused by uncontrolled cell division, meaning that many more cells are present in tumor tissue than elsewhere within normal tissue.
cancer cells are known to be larger than normal cells.

Explanation:

Cancer is characterized by uncontrolled cell division. Tumors form due to this unregulated growth, resulting in a higher cell count in tumor tissue compared to normal tissue. G1 phase of interphase is part of normal cell cycle and not directly related to cancer - cell - recognition enzyme shutdown in this simplistic way. DNA replication is a normal process (though in cancer it may be dysregulated, but the key aspect of tumor formation is uncontrolled cell division). The size of cancer cells (being larger) is not the main reason for tumor formation compared to the cell - division aspect.

Answer:

Tumors are caused by uncontrolled cell division, meaning that many more cells are present in tumor tissue than elsewhere within normal tissue.