Question

question 20
what is the normal process that cells in our body undergo?
they constantly divide, die, and are replaced in a controlled manner.
they only die and are replaced by identical copies.
they remain static and never change.
they only grow larger over time.

Explanation:

Cells in the body are in a dynamic state. Through processes like mitosis, they divide to produce new cells. Over time, cells also age and die (apoptosis). New cells replace the old ones in a regulated way. This continuous cycle of division, death, and replacement is essential for the body's growth, repair, and maintenance. The option "They only die and are replaced by identical copies" ignores the division aspect. "They remain static and never change" is incorrect as cells are always in flux. "They only grow larger over time" is also wrong because cell size is regulated and not the only process.

Answer:

They constantly divide, die, and are replaced in a controlled manner.