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Animalia
Animalia
Eucidaris tribuloides
Sea urchins have transparent egg cells and produce 100,000 to 2,000,000 of them at a time. Their eggs being both easy to see under a microscope and abundant made Sea urchins eggs a favorite of scientists to study cell growth, chromosomes, genes, etc.. - Insight from the Sea Urchin
Scientist Ernest Everett Just used sea urchins to figure out how eggs stop multiple sperm from fertilizing them. This process, called polyspermy blocking, makes sure only one sperm can get in, preventing any problems that could happen if many sperm tried to fertilize the same egg. This helps in normal development and avoids issues like cell death.- Ernest Everett Just, Johannes Holtfreter, and the origin of certain concepts in embryo morphogenesis
Ernest Everett Just
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