- 06/06/2019 at 8:50 pm #1123187EduGorillaKeymasterSelect Question Language :
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer out of the four alternatives for the given blanks.
Up to 16 percent of all species on earth could (196) as potential alien species and if they invade new regions, (197) will be difficult to predict. The study shows that the number of newly emerging alien species (198) to rise, posing a (199) challenge to biosecurity interventions worldwide. For plants, mammals and fishes, the proportion of newly (200) alien species has remained constant.
If they invade new regions, ________ will be difficult to predict.
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