. Foundations of botany. Ks S. 252 FOUNDATIONS OF BOTANY In conceptacles of the other kind examine the numerous smallsac-shaped cells (antheridid). At maturity the contents of eachdivide to form numerous very minute motile antherozoids, each withtwo delicate hairs or cilia. Dissect, by picking and by friction under cover-glass, a bunch ofantheridia and notethe branching fila-ments upon whichthey are borne. Make drawings toillustrate the variouspoints of structure. 295. Number ofAntherozoids requiredfor Fertilization.—Thebulk of an oospherehas been estimatedequal to that of thirtythousand to si
. Foundations of botany. Ks S. 252 FOUNDATIONS OF BOTANY In conceptacles of the other kind examine the numerous smallsac-shaped cells (antheridid). At maturity the contents of eachdivide to form numerous very minute motile antherozoids, each withtwo delicate hairs or cilia. Dissect, by picking and by friction under cover-glass, a bunch ofantheridia and notethe branching fila-ments upon whichthey are borne. Make drawings toillustrate the variouspoints of structure. 295. Number ofAntherozoids requiredfor Fertilization.—Thebulk of an oospherehas been estimatedequal to that of thirtythousand to sixtythousand antherozoids,but apparently anoosphere may be fer-tilized by only oneantherozoid. Yet alarge number swarmaround each oosphereafter both haveescaped from the con-ceptacles, and oftentheir movements areso active as to cause the rotation of tlie oosphere. The process offertilization may be discerned in fresh material by squeezingoospheres and antherozoids from their respective conceptacles intoa drop of water on a s
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