A) no movement
B) no reproduction
C) a change in appearance
D) a decrease in size
E) All of the choices occur.

A) cell walls
B) cell membranes
C) ribosomes
D) cellular proteins
E) cytoplasm

A) Cells die at increasingly greater rates.
B) Only older cells die in a culture.
C) Cells in a culture die at a constant rate.
D) Upon contact with the control agent, all cells die at one time.
E) Cells become metabolically inactive but are never killed.