5 – Winnie the Pooh’s friend Eeyore said of these despised green things, “they are flowers too, once you get to know them.” (WEEDS)

 10 – Dead zones in the Chesapeake Bay result when blooms of these plants lead to oxygen-deficient water. (ALGAE)

 15 – Bristlecone pine trees are extremely long-lived.  In fact, one was recently found to have over 1844 of these age marks.  (ANNULAR RINGS)

 20 – The counterpart to the pores on human skin are these S-initialed botanical openings found on leaves. (STOMATA)

 25 – It’s been found that tomatoes have something in common with halophytic plants, like mangrove trees, in that they too prefer to grow in soil that is _________. (SALTY)