Question

UNC emeritus professor Alan Fedducia has long argued that supposed “proto” precursors to these structures are simply collagen fibers or ossified tendons. They’re not teeth, but pulp caps are gradually reabsorbed into the rachis during the formation of these structures. The disintegration of the “powder down” variety (15[1])of these structures produces (-5[1])copious amounts of fine keratin dust. (15[1])Hooklets and cilia (15[2])branch from the (*) barbules of these structures. Rectrices (10[1]-5[2])and remiges (10[1])are specialized types of the contour variety of these structures that possess an expansive (-5[1])vane. These structures (10[1])develop in bloody white sheaths as pins. Raised “knobs'' on the ulna are indicative of these structures in fossils, which likely evolved to provide insulation. (10[2])For 10 (-5[1])points, preening (10[1])is the rearrangement (10[3])of what (10[3])bristled, (10[1])water-proof (10[2])structures (10[2])whose aerodynamic qualities help birds to fly? (10[2])■END■ (10[1]0[1])

ANSWER: feathers [accept contour feathers or pennaceous feathers or down feathers; accept flight feathers; accept pin feathers] (Feduccia is a leading proponent in the theory that birds didn’t evolve from dinosaurs, but rather that they evolved from a related lineage.)
<KT, Biology>
= Average correct buzz position

Buzzes

PlayerTeamOpponentBuzz PositionValue
Daniel MaFarrellmagnetismBoston College4615
Iris CreightonCambridge BImperial B50-5
Sanjay SrihariGeorgia Tech BTennessee A5615
Arya KarthikGeorgia Tech DGeorgia Tech C5915
Schuyler ColfaxOxfordEdinburgh5915
Brendan BethlehemCambridge ABirmingham6710
Jacob GoodsonOhio State BOhio State A 67-5
Pablo LloydHCCTexas A67-5
DennisMichigan BKenyon A6910
Ted WarnerBristolWarwick83-5
Sinecio MoralesJohns HopkinsGeorgetown8610
Aditya SharmaDukeNorth Carolina A11110
Ethan CohenGeorge Washington AMaryland A11110
YashwanthMichigan AKenyon B113-5
Vince IngersollTexas CTAMU11510
Benjamin McAvoy-BickfordNorth Carolina BNC State11810
Michael ZhouGeorgia Tech AGeorgia B11810
Michael KohnDurhamImperial A11810
Sean JacksonSouth Carolina AJames Madison B12010
Aidan LeahyGeorgia AEmory A12010
Andrew VolneyTAG Magnet: Taylor's VersionTexas B12010
Stefan Stealey-EuchnerArizona StateGanon Evans Fan Club12110
Elena HernandezSouth Carolina BJames Madison A12210
Ariel FaederMSU A and FriendZen and the Art of Buzzing12210
Emily BussaMaryland BGeorge Washington B12310
ChloeKenyon BMichigan A12310
Rahim DinaImperial BCambridge B13010
Ryan HumphreyTexas AHCC13010
Dillon PatelWarwickBristol13110
Calvin BostlemanOhio State A Ohio State B1310