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Contribution #59 of 365
Ernest Everett Just
Pioneering Discoveries in Fertilization and Cell Development
1912
The contribution
How this work helped shape America
Biologist Ernest Everett Just conducted foundational research on fertilization, marine organisms, and the surface of the egg cell. His experimental work demonstrated that the point where sperm enters an egg determines the first cleavage plane, advancing scientific understanding of fertilization and early cellular development.