Which of the following explains why normal cells grown in a petri dish tend to stop growing once they have covered the bottom of the dish? Select one: a. The cells lack cyclin. b. The petri dish inhibits cell growth. c. Contact with other cells stops cell growth. d. Most cells grown in petri dishes have a defective p53.

c. Contact with other cells stops cell growth.

Explanation:

If cells have a particular amount of space( for a example a petri dish) and essential nutrients they keep growing and replicating, once they utilize all the space and come in contact with one another, they stop growing.

This action or mechanism shown by normal cells is referred to as contact inhibition. It is very important in the development and differentiation of cells.

Contact inhibition helps cells to grow side by side in an organised and layered style also known as a monolayer.

Contact inhibition is an important mechanism used by cells to prevent the occurrence of cancer. It restrains cells from growing all over each other.

Cancerous cells lack the mechanism of contact inhibition because they tend to keep reproducing as they comes in contact with each other, they grow over one another to the extent that they spread into the tissues and various organs on the body.

i think the answer is b.

c. establishing proper sleep hygiene