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Biogenetic Law(Ontogeny recapitulate Phylogeny), Baer's law Video Lecture | Zoology Optional Notes for UPSC
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FAQs on Biogenetic Law(Ontogeny recapitulate Phylogeny), Baer's law Video Lecture - Zoology Optional Notes for UPSC
| 1. What is the Biogenetic Law and how does it relate to Ontogeny recapitulate Phylogeny? |  |
Ans. The Biogenetic Law, also known as Ontogeny recapitulates Phylogeny, is a theory that suggests that the development of an organism (ontogeny) mirrors the evolutionary history of its species (phylogeny). This means that the stages of development an organism goes through during its lifetime reflect the evolutionary stages its ancestors went through.
| 2. Who proposed Baer's Law and what does it state? | |
Ans. Baer's Law was proposed by Karl Ernst von Baer, a 19th-century embryologist. Baer's Law states that the general characteristics of a group of animals appear earlier in the embryo's development than the specialized characteristics. In other words, embryos of different species look similar in the early stages of development but become more distinct as they mature.
| 3. How is the concept of Biogenetic Law and Baer's Law relevant in the field of evolutionary biology? | |
Ans. The concepts of Biogenetic Law and Baer's Law are important in evolutionary biology as they help scientists understand the relationship between embryonic development and evolutionary history. By studying how organisms develop from embryos to adults, researchers can gain insights into the evolutionary processes that have shaped different species over time.
| 4. What are some examples of evidence that support the Biogenetic Law and Baer's Law? | |
Ans. Some examples of evidence that support the Biogenetic Law and Baer's Law include the similarities in early embryonic stages of different species, such as the presence of gill slits in human embryos which are reminiscent of fish gills. Additionally, the order in which certain traits develop in embryos often mirrors the evolutionary history of the species.
| 5. How do scientists use the principles of the Biogenetic Law and Baer's Law to study evolutionary relationships between different species? | |
Ans. Scientists use the principles of the Biogenetic Law and Baer's Law to study evolutionary relationships by comparing the developmental stages of embryos from different species. By identifying similarities and differences in embryonic development, researchers can infer how closely related different species are and gain insights into their evolutionary history.
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Jan 06, 2025
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