What are the effects of computer hacking?

What are the four basic classes of organic molecules how do they differ structurally and functionally

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

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.