How does cell communication and the cell cycle relate to one another?

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

How do ratio scale and diagrammatic scale work