Answer:
The rule of magnetism illustrated is the field lines are more concentrated at the poles and also about the direction of magnetic field.
Explanation:
- Every magnet has two pole, north pole and south pole. The like poles repel each other and unlike poles attract each other.
- The direction of magnetic field is from north to south that can be seen by the iron filling experiment.
- When the iron fillings are kept near the bar magnet, we observe that most of the fillings are attached to either poles.
- It is due to the fact that the concentration of magnetic field is highest at the poles.
Answer:
Channels discriminate between solutes mainly on the basis of size and electric charge.
Explanation:
Answer:
The cell membrane, or in plant cells, the cell wall
Explanation:
In a plant cell the cell wall helps maintain structure, and in animal cells, the cell membrane regulates what goes in and out of the cell and acts as a structure
