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3 days ago · Based on these and similar studies and because of the lack of hard evidence supporting the idea, the concept of Pangenesis was largely abandoned and replaced by Weismann's Germ-Plasm theory, which postulated that information only flows from germ cells to somatic cells, and not vice versa (also known as the ‘Weismann barrier’).
5 days ago · The first, proposed by German biologist August Weismann back in 1881, suggests that aging is a pre-programmed process —a sort of built-in expiration date that evolved to benefit the species by making room for younger, healthier individuals. The second theory, known as the “disposable soma” hypothesis, theorizes that aging is simply the ...
3 days ago · The Theory of Evolution has its own evolution through more than a century of scientific controversy; its own variations, now elicited by the need of adaptation to a changing environment in philosophical thought, in religious and even political history, now consisting of imperceptible modifications immanent in the process; and through it all runs, like a principle of natural selection, the iron ...
2 days ago · Since the work of August Weismann on germ-plasm theory in biology and of Julian Huxley on the nature of the individual in evolutionary theory, the various species of green algae belonging to the family Volvocaceae have been recognized as important ones in the study of evolutionary transitions from uni- to multicellular life.
2 days ago · 2. **August Weismann’s Germ Plasm Theory (1883)**: Weismann proposed that inheritance is carried by germ cells (sperm and egg), not by somatic cells (body cells). This theory suggested that environmental influences and previous mates could not alter the genetic material passed to offspring. 3.
May 8, 2024 · First published in Italian in 1977, Mario Mieli's groundbreaking book is an early landmark of revolutionary queer theory - now available for the first time in a complete and unabridged English translation.Among the most important works ever to address the relationship between homosexuality, homophobia and capitalism, Mieli's essay continues to ...
5 days ago · Case 11-2024: An 82-Year-Old Woman with Falls and Cognitive Decline. S.A. Chung and OthersN Engl J Med 2024;390:1312-1322. An 82-year-old woman was admitted because of difficulty walking, falls ...
