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There is a huge number of what you are asking about, commonly referred as evolutionary baggage or evolutionary holdovers and come in a wide variety of severities. You breath and eat using the same tube (esophagus), in fish temporarily blocking the esophagus has little impact since they can still breath, the esophagus is behind the gills. You only get two ...


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(This answer is related to my answer on Bacteria resistance to natural antibiotics on the Biology SE) First of all: When it comes to evolution, Biology doesn't talk of 'strong' and 'weak' , it talks of 'fitness' ("survival of the fittest", for example), which is about how well adapted to their environment an organism is. Fitness includes how well it can ...


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Changes in the virulence of the SARS-CoV-2 will be driven by evolutionary pressure. We know so far that the virus is mutating slowly The COVID-19 virus does not mutate very fast. It does so eight to 10 times more slowly than the influenza virus, said Anderson, making its evolution rate similar to other coronaviruses such as Severe Acute Respiratory ...


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According to an online article [See Reference], “The tailbone derived its name because some people believe it is a ‘leftover’ part from human evolution, though the notion that the tailbone serves no purpose is wrong,...” A look at an anatomy reference book will reveal that many muscles, tendons and ligaments attach to the tailbone (a.k.a. coccyx); these ...


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In short, because mutations are not defined as specific. A mutation of any bacteria could be mutation that could be weak or strong. Weak & Strong would be quantified by our technology, treatments and comprehension of the bacteria. There are two factors important to understanding the change of the bacteria. Epigenetic Adaptation (No Genetic ...


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