What are the differences between Darwin's, Lamarck's, and Weismann's theories of evolution? Let's take a look 🙏❤️

Theories of Evolution
🧬 Lamarckism posits that evolution occurs due to the use and disuse of organs; traits acquired during an organism's lifetime can be inherited by offspring.
🦍 Darwin's Theory emphasizes variation within a population, where individuals best suited to the environment survive and reproduce, driving change across generations through natural selection.
🔬 Weismann's Theory asserts that only traits originating from germ cells (sex cells) are heritable, meaning changes occurring in the body during life are not passed on to the next generation.

Key Points & Insights
➡️ Evolution is understood through three distinct mechanisms: acquired characteristics (Lamarck), environmental fitness/selection (Darwin), and the limitation of heritability to germline changes (Weismann).
➡️ Lamarck's theory included the belief that acquired characteristics gained through use or disuse were inheritable, a concept later challenged.
➡️ Weismann's work clarified that evolution relies on traits present in the reproductive cells, isolating evolutionary change from somatic body modifications.

📸 Video summarized with SummaryTube.com on Jan 20, 2026, 15:15 UTC