produced when vaporized particles collide with the walls of a sealed container.

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

Which measure of an earthquake depends on how close you are to the focus?

The largest unit within which gene flow can readily occur is a