Organism | : | Echinoderm Sea urchin |
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Species | : | Paracentrotus lividus |
Description | : | The egg elevates a fertilization envelope blocking other sperm from entering. The elevation of this protein barrier participates in the block to the entry of multiple sperm (polyspermy). Sea Urchin Paracentrotus lividus. |
Project | : | Biologymultimedia |
Website | : | http://www.biologymultimedia.com |
Tags | : | Egg |