Whats the definition of a seed i don't have a dictionary

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

When analyzing tree rings, what do scientists assume a thin ring indicates?

What occurs to the cell during mitosis