Iron filing are attracted by magnet. This is a physical property of iron but not of most other materials including sand. How could you use this difference in physical properties to separate a mixture of iron filing and sand

5) The various organelles increase the energy used by the cell

6) City Hall- directs necessary activities throughout the day

7) Cell wall

Explanation:

5)  Organelles are important because they allow chemical processes to occur at the same time without interfering with one another.

6) The nucleus coordinates cell activities like protein synthesis and cell division.

7) The cell wall provides the shape of the cell.