Explain about vaccine?​

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

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

Asap what occurs after cytokinesis is completed at the end of meiosis 1?