Organism | : | Echinoderm Sea urchin |
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Species | : | Paracentrotus lividus |
Description | : | In the sea urchin, fertilization is external and occurs when sperm and egg meet in open water, thus producing millions of embryos. Photo : N Sardet, CNRS |
Project | : | The Plankton Chronicles |
Website | : | http://www.planktonchronicles.org |
Tags | : | Embryo Egg Fertilization |