Question

what is the main function of the cell membrane in an animal cell?
to pull replicated chromosomes apart during cell division
to control which substances enter and leave the cell
to break down waste and worn - out cell parts
to contain the information that the cell uses for growth and activities

Explanation:

The cell membrane is semi - permeable. It regulates the movement of substances in and out of the cell, maintaining the cell's internal environment. Pulling replicated chromosomes apart is a function of the spindle fibers during cell division. Breaking down waste is a function of lysosomes. Containing cell growth and activity information is a function of DNA in the nucleus.

Answer:

to control which substances enter and leave the cell