"In species with internal fertilization -- like mammals, birds and insects -- sperm fertilize eggs inside the female's body, while in species with external fertilization -- like sea urchins and many ...
June 21 (UPI) --For every animal, sperm perform the same function -- egg fertilization. Yet sperm size varies dramatically from species to species. Most studies on the topic have focused on how sperm ...
Sperm size varies dramatically among different animal species. But why is sperm size so variable when they share the same job - to fertilize eggs? In a new article published in Nature Ecology and ...
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