Question

1. a teacher shared this model with her class. movement of oxygen molecules across a cell membrane high concentration low concentration cell membrane oxygen molecules which statement is best explained by the model? how the cell membrane controls what enters and exits the cell how the cell membrane protects the cell from harmful chemicals how oxygen concentration is always different inside and outside of cells how oxygen is important for body cells to survive and reproduce

Explanation:

The model shows oxygen molecules moving from an area of high concentration to an area of low concentration across the cell membrane. This is an example of how the cell membrane controls the movement of substances (in this case, oxygen) into and out of the cell. The other options are not directly related to what the model depicts. The model does not focus on protection from harmful chemicals (no indication of harmful substances in the model), it doesn't show that oxygen concentration is "always" different (just a one - time movement shown), and it doesn't explain the importance of oxygen for cell survival and reproduction (no information about cell processes like survival or reproduction in the model).

Answer:

how the cell membrane controls what enters and exits the cell