Sentence Examples


  • The tetraspores may arise by the simultaneous division of the contents of a sporangium, when they are arranged tetrahedrally, or they may arise by two successive divisions, in which case the arrangement may be zonate when the spores are in a row, or cruciate when the second divisions are at right angles to the first, or tetrahedral when the second divisions are at right angles to the first and also to one another.
  • Corallina sp., tetrasporangia with zonate arrangement of tetraauxiliary cells, the nuclei of which a and b retire to the wall.
 
 

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