Write any three known facts about magnetism.

Write any three uses of PCR.

Studies in the cell structure and physiology of bacteria and human being recognize the significance of a common ancestor in evolution. Write any three facts to prove this.

Write any three uses of PCR

Write any three uses of electromagnets.

Write any three uses of magnets.

Write any three properties of magnetic field lines.

Magnetic field lines are the visualization of magnetic field.Write any three properties of magnetic field lines.