When Evolution Runs Backwards IELTS Reading Answers
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The Academic passage ‘When Evolution Runs’ is a reading passage that appeared in an IELTS Test.
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When Evolution Runs Backwards
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Question number | Answer | Keywords | Location of keywords |
---|---|---|---|
1 | C | 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 | Paragraph C;
Line 3 |
2 | D | Explorer Roy Chapman Andrews argued at the time that the whale must be a throwback to a land-living ancestor. | Paragraph D;
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3 | C | If these silent genes are somehow switched back on, they argued, longlost traits could reappear. | Paragraph E;
Last line |
4 | B | The salamander example fits with Raff’s 10million-year time frame. | Paragraph G;
Last line |
5 | A | According to his analysis of the Bachia family tree, the toed species re-evolved toes from toeless ancestors and, what is more, digit loss and gain has occurred on more than one occasion over tens of millions of years. | Paragraph H;
Last line |
6 | F | 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 | Paragraph A;
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7 | G | While Lombroso was measuring criminals, a Belgian palaeontologist called Louis Dollo was studying fossil records and coming to the opposite conclusion | Paragraph C;
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8 | A | so many other examples have been discovered that it no longer makes sense to say that evolution is as good as irreversible. | Paragraph E;
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9 | B | similar structures can independently arise in unrelated species, such as the dorsal fins of sharks and killer whales. | Paragraph I;
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10 | D | Another more intriguing possibility is that the genetic information needed to make toes somehow survived for tens or perhaps hundreds of millions of years in the lizards and was reactivated. | Paragraph I;
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11 | NOT GIVEN | – | – |
12 | YES | the toed species re-evolved toes from toeless ancestors and, what is more, digit loss and gain has occurred on more than one occasion over tens of millions of years. | Paragraph H;
Last line |
13 | NO | Early embryos of many species develop ancestral features. | Paragraph J;
Line 3 |
14 | YES | The answer may lie in the womb. | Paragraph J;
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