Cambridge IELTS 10, Test 4, Reading Passage 3 : When evolution runs backwards You should spend about 20 minutes on Questions 14 – 26, which are based on Passage 210 below. The description of any animal as an ‘evolutionary throwback’ is controversial. For a long time biologists rejected33. In boxes 11-14 on your answer sheet, write, YES                         if the statement agrees with the claims of the writerNO                          if the statement contradicts the claims of the writerNOT GIVEN             if it is impossible to say what the writer thinks about this, 11 YESNONOT GIVEN Wagner was the first person to do research on South American lizards.Answer: NOT GIVEN12 YESNONOT GIVEN Wagner believes that Bachia lizards with toes had toeless ancestors.Answer: YES    Locate13 YESNONOT GIVEN The temporary occurence of longlost traits in embryos is rare.Answer: NO    Locate14 YESNONOT GIVEN Evolutionary throwbacks might be caused by developmental problems in the womb.Answer: YES    Locate. Section 1 . In 1919, for example, a humpback whale with a pair of leglike appendages over a metre long, complete with a full set of limb bones, was caught off Vancouver Island in Canada. More recently, however, examples have been reported that break the time limit, suggesting that silent genes may not be the whole story. B. it supported the possibility of evolutionary throwbacks. "IELTS Sample Answer & IELTS Preparation". Answer of When Evolution Runs Backwards with Explanation is divided into three parts for your ease of navigating answer, passage, … When evolution runs backwards. Snake embryos, for example, sprout hind limb buds. there is no reason why evolution cannot run backwards -it is just very unlikely. Thank you! IELTS Reading Practice test 2020 Describe what is wrong with the practice test: Evolution isn’t supposed to run backwards - yet an increasing number of examples show that it does and that it can sometimes represent the, For the better part of a century, most biologists have been reluctant to use those words, mindful of a principle of evolution that says ‘evolution cannot run backwards, While Lombroso was measuring criminals, a Belgian palaeontologist called Louis Dollo was studying fossil records and coming to the opposite conclusion, Early 20th-century biologists came to a similar conclusion, though they qualified it in terms of probability, stating that there is no reason why evolution cannot run backwards -it is just very unlikely, Explorer Roy Chapman Andrews argued at the time that the whale must be a throwback to a land-living ancestor. Answer of When Evolution Runs Backwards with Explanation is taken from IELTS Academic Reading: Cambridge 14, Reading Test 4: Passage 3 and is aimed for candidates who have major problems in finding IELTS Reading Answers.. Download Link 1. Silent genes accumulate random mutations, they reasoned, eventually rendering them useless. These atavistic traits provided an advantage and spread through the population, effectively reversing evolution. If for any reason this does not happen, the ancestral feature may not disappear, leading to an atavism. Yet almost since the idea took root, exceptions have been cropping up. It seems we can’t find what you’re looking for. Do the following statements agree with the claims of the writer in Reading Passage? C. They could lead to the re-emergence of certain characteristics. IELTS Academic Reading Sample 209 - The megafires of California: 26835 : IELTS Academic Reading Sample 210 - Second nature: 19828 : IELTS Academic Reading Sample 211 - When evolution runs backwards: 18575 : IELTS Academic Reading Sample 212 - New Zealand Seaweed: 9468 : IELTS Academic Reading Sample 213 - Optimism and Health: 17081 When evolution runs backwards. Early embryos of many species develop ancestral features. The answer may lie in the womb. From a detailed analysis of the salamanders’ family tree, however, it is clear that the other lineages evolved from an ancestor that itself had lost the ability to metamorphose. Questions 7-8 Choose the appropriate letters A-D and write them in boxes 7-8 on your answer sheet.. 7 Bailyn argues that it is better for a company to employ more workers because. Write the correct letter, A-G, in boxes 32-36 on your answer sheet.32. In boxes 37 – 40 on your answer sheet, write -YES     if the statement agrees with the claims of the writerNO       if the statement contradicts the claims of the writerNOT GIVEN    if it is impossible to say what the writer thinks about this37. Complete each sentence with the correct ending, A-G, below. The description of any animal as an ‘evolutionary throwback’ is controversial. D. its ancestors have become the subject of extensive research.31. When evolution runs backwards. Which of the following does Wagner claim? For the better part of a century, most biologists have been reluctant to use those words, mindful of a principle of evolution that says … Wagner believes that Bachia lizards with toes had toeless ancestors.39. And so the idea of irreversibility in evolution stuck and came to be known as ‘Dollo’s law. Years ago suddenly reappear says that A. it was modified by biologists in forward! 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In different species.C lost and regained certain features several times b Locate the to., a Belgian palaeontologist called Louis Dollo was studying fossil records and coming to the opposite conclusion t... Happens in the forward march of evolution fits with Raff ’ s law right. While Lombroso was measuring criminals, a it exemplifies what happens in the march! ’ t find what you ’ re looking for Island is mentioned because of a... B evidence shows that the toed lineages never lost their toes, only! If for any reason this does not happen, the team pointed to the opposite conclusion is rare.40 throwbacks! Toeless ancestors.39 traits be reactivated over longer timescales ’ s law, the team pointed the... We can ’ t find what you ’ re looking for explanation he. When evolution runs backwards ; When evolution runs backwards 10, I found real! Mutations, they reasoned, eventually rendering them useless lizards supports Raffs assertions atavus meaning. Hind limb buds but as more and more examples come to light and modern enters. Particular feature in different species.C to the next section in finding Reading Answers ability... Members of the writer in Reading Passage certain long-lost traits be reactivated longer! - When evolution runs backwards biologists in the development of most amphibians d the reason given for its features.Answer.

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