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The first fossilized evidence of sexual reproduction in eukaryotes is from the Stenian period, about 1.05 billion years old. [19] [20]Biologists studying evolution propose several explanations for the development of sexual reproduction and its maintenance.
In population ecology and demography, the net reproduction rate, R 0, is the average number of offspring (often specifically daughters) that would be born to a female if she passed through her lifetime conforming to the age-specific fertility and mortality rates of a given year.
Uterus didelphys seen on ultrasonography. Besides a physical examination, the physician will need imaging techniques to determine the character of the malformation: gynecologic ultrasonography, pelvic MRI, or hysterosalpingography.
Flow (Latvian: Straume) is a 2024 animated fantasy adventure film directed by Gints Zilbalodis and written by Zilbalodis and Matīss Kaža. Featuring no dialogue, the film follows a cat, dog, capybara, secretarybird, and ring-tailed lemur, in an apparently post-human world, trying to survive as the water level dramatically rises around them.