Sentence Examples


  • Development of an ovum without fertilization.
  • The ovum of Hydromedusae is usually one of a large number of odgonia, and grows at the expense of its sister-cells.
  • The cleavage of the ovum follows two types, both seen in Tubularia (Brauer [3]).
  • In the first, a cleavage follows each nuclear division; in the second, the nuclei multiply by division a number of times, and then the ovum divides into as many blastomeres as there are nuclei present.
  • In Cunina parasitica, however, the ovum develops into an actinula, which buds actinulae as before, but only the daughter-actinulae develop into medusae, while the original, parent-actinula dies off; here, therefore, larval budding has led to a true alternation of generations.

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