15 word crossword puzzle

interaction between two different organisms living in close physical association, typically to the advantage of both
a tax or duty to be paid on a particular class of imports or exports
a plan of action or policy designed to achieve a major or overall aim.
the right to vote in political elections
reduce to fine particles
a state, period, or place of isolation in which people or animals that have arrived from elsewhere or been exposed to infectious or contagious disease are placed
the leading character or one of the major characters in a drama, movie, novel, or other fictional text
a state of perplexity or uncertainty over what to do in a difficult situation
medium-sized sailboat equipped for cruising or racing
an organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense
shockingly bad or excessive
a colorless unstable toxic gas with a pungent odor and powerful oxidizing properties, formed from oxygen by electrical discharges or ultraviolet light. It differs from normal oxygen (O2) in having three atoms in its molecule (O3
the vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves
a word formed from a verb and used as an adjective
a plane figure with at least three straight sides and angles, and typically five or more.