Pellucida sentence example

pellucida
  • Most important are the fine structures of diatoms such as Surirella gemma and Amphipleura pellucida or artificial fine divisions as in a Nobert's grating.
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  • Norbert's test plates, which bear graduated groups of extremely fine and narrow divisions are very useful, while the tests of Amphipleura pellucida and Surirella gemma are often employed.
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  • The egg is surrounded by a special coat called the zona pellucida.
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  • E. aegyptiaca, with silvery-white plumes, maxima, elegans, pilosa, amabilis, pellucida, capillaris, plumose, are all elegant annuals.
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  • For fertilization to occur, a sperm must penetrate the tough outer membrane of the egg called the zona pellucida.
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  • When one sperm successfully binds with the zona pellucida, a series of chemical reactions occurs to allow only that sperm to penetrate.
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  • About sixty hours after fertilization, approximately sixteen cells have formed to what is called a morula, still enclosed by the zona pellucida; three days after fertilization, the morula enters the uterus.
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  • The zona pellucida disappears and the morula becomes a blastocyst.
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