Using evidence from the text, how did natural selection determine the survival of medeival humans during the black death( bubonic plague)? Please explain in 4 to 4 sentencesUse the words: variation, natural selection, favorable traits Read and annotate the text below. Answer the questions that follow.Natural Variation and Disease SurvivalThe changes in the rock pocket mice population explored in class is a result of naturalselection. Evolution by natural selection is a process first described by two scientists,Charles Darwin and his contemporary Alfred Russel Wallace. Natural selection is theprocess by which organisms that are better adapted to their environment tend tosurvive and reproduce more offspring that have similar traits. Over time, naturalselection can lead to changes in populations. All the diversity on earth that we cansee today is ultimately due to populations changing over time due to natural selection.In the pocket mice, we saw that the mice population had natural variation in their furcolor. These variations arise from mutations (changes in DNA sequences) in sex cells(eggs and sperm). These variations are found in some individuals, and not others,because of sexual reproduction. In other words, sexual reproduction generates eggsand sperm that contain a variety of possible traits. Humans, as a population, alsohave variations. Look around at your classmates. Some variations we can easily see,hair color is an example. However, many of the differences between people are traitsthat we cannot see. For example, some people make an enzyme, lactase, as anadult. These people are able to easily digest lactose, the sugar found in milk. Otherpeople do not produce this variation; they are lactose-intolerant and cannot easilydigest milk. Another example is blood type. Humans have different blood types, butthis trait is not visible just by looking at someone.Scientists have been studying variations in the immune systems of differentpopulations of people in order to try to determine its role in survival during the BlackPlague . Geneticists have found that there are differences in immune system genes(section of DNA that determine a trait) between populations of people whoseancestors were exposed to the Black Death in Europe, and those that were notexposed (such as people from China and Africa). Many of the surviving people fromEurope do have a set of genes that provide partial to full immunity to Yersinia pestis,the bacteria that caused the Black Plague.People whose ancestors are from China and Africa generally lack these genes.Therefore, there may have been some people living in Europe during the Black Deaththat were lucky enough to have variations in their immune systems that gave them some immunity to the Black Plague. These people were possibly better able to fightoff the bacteria, survive, reproduce, and pass these immune system traits on theiroffspring.Variation in the human immune system may also explain why some people are moresusceptible to severe COVID-19 infections. A recent study by the National Institutes ofHealth found that among nearly 660 people with severe COVID-19, a significantnumber carried rare genetic variants in 13 genes known to be critical in the body'sdefense against influenza virus, and more than 3.5% were completely missing afunctioning gene. Further experiments showed that immune cells from those 3.5% didnot produce any detectable immune response to the virus that causes COVID-19.Other researchers have found that blood type (also genetically determìned) isassociated with more severe infections. People with A positive blood types tend to bethe most at risk, and those with blood group 0 have some protection from severeCOVID-19 infections.

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Evolution is an orderly change from one condition to another that are favourable for an individual…

Using evidence from the text, how did natural selection determine the survival of medeival humans during the black death( bubonic plague)? Please explain in 4 to 4 sentences Use the words: variation, natural selection, favorable traits