INSTRUCTIONS: Edit the following paragraph for subject-verb agreement only. Find any incorrect verb forms in each sentence, and correct them to agree in number with the subject. Though genetically altered salmon are now being gown in hatcheries, scientists needs to consider the implications to society if any of these fish accidentally returns to the wild. The new designer fish have altered genes so they grows twice as fast as other salmon, and some of the salmon is even able to grow in waters that are extremely cold. If they continues to grow and mature at such an accelerated rate, they may dominates the waters and threaten native species in the wild. Perhaps this will even cause the extinction of entire species. Though scientists also alters the salmon's genes to render them

Question

sterile, they cannot guarantee that one hundred percent of the salmon are sterile. If these salmon shows aggressive traits, as some scientists say they do, they might become predators of other fish. Also, with the promise of being able to survive in colder water, they have the potential to spread throughout the world. Since these fish has the potential to repopulate fast, it would only take one or two designer fish to start a new strain of salmon. Though scientists is working hard to produce enough salmon to increase the world food supply, they must be sure not to upset the world's ecosystem.

What will be an ideal response?

Answer 1

(Verbs that need to be changed are in boldface.)

     Though genetically altered salmon are now being gown in hatcheries, scientists need to consider the implications to society if any of these fish accidentally return to the wild. The new designer fish have altered genes so they grow twice as fast as other salmon, and some of the salmon are even able to grow in waters that are extremely cold. If they continue to grow and mature at such an accelerated rate, they may dominate the waters and threaten native species in the wild. Perhaps this will even cause the extinction of entire species. Though scientists also alter the salmon's genes to render them sterile, they cannot guarantee that one hundred percent of the salmon are sterile. If these salmon show aggressive traits, as some scientists say they do, they might become predators of other fish. Also, with the promise of being able to survive in colder water, they have the potential to spread throughout the world. Since these fish have the potential to repopulate fast, it would only take one or two designer fish to start a new strain of salmon. Though scientists are working hard to produce enough salmon to increase the world food supply, they must be sure not to upset the world's ecosystem.