(botany) meristem

(rare) activity, vigor, vivacity

active, vigorous, spirited, perky, vivacious

very; extremely / exceedingly; tremendously

extraordinary, unusual

emergency

organization (a group of people with a purpose) / system (a group of people) / (biology) tissue (a group of similar cells that function together to do a specific job)

to organize something

be divided; be split; break up

division, split, breakup