Round 3: Tossup 13

These structures are classified as alete if their surfaces lack laesura or ridge lines. Buildup of Buller’s drops accompanies the release of these structures in a “surface tension catapult” mechanism. These structures are concentrated in strobili by Equisetum. Blastic and thallic processes produce a non-motile type of these structures called conidia. Columella support “vessels” enclosing these structures, which are singular and unbranched (-5[1])in bryophytes. A haploid gametophyte (-5[1])phase (-5[1])contrasts with a diploid phase that produces these structures in alternation of generations. (10[2])Puffballs have fruiting bodies that burst to release (10[1])these structures, (10[1])which are formed in gills beneath (-5[1])the cap. For 10 points, name these reproductive structures that, unlike seeds, are dispersed as unicellular units. ■END■ (10[4])

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Summary