hier1-population deer in hier1-community.html?
hier2-molecule chlorophyll 4 porphyrin rings: O, N, Mg
hier2-tissue epidermal
eukarya Order Carnivora posses carnassials: last upper premolars and first lower molars adapted for shearing food in a scissor-like manner.
Scientific Dragonflies that cross oceans: simple observations lead to breathtaking discoveries
edison 2K trials carbon filament (platinum did not work) 1879, replaced by tungsten. (argon-nitrogen) (quartz glass/halogen-iodine,krypton,xenon) Electrical Discharge: phosphor coatings: Fluorescent, Mercury/Soduim Vapour
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SQ 1=B  2=d  3=a  4=C  5=c
   6=c  7=c  8=D  9=b 10=c
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Add themes, esp evolution
Add theory from ch22 Q6: attempts to explain many related phenomena.