City limits/police department because it controls what goes in and out of the cell. City limits control what is in and out of the city
Where are your scratch tests? The question cannot be answered without having them to look at.
Answer:
The Viking tubing is meant to be the cell membrane. Glucose manages to move out of the bag and into the surrounding water but starch does not. Not all substances can pass through the cell membrane; some molecules, like starch are too large. The cell membrane is called selectively permeable because of this.
Explanation:
