The migration patterns of _____ are influenced by seasonal changes in temperature and food availability., A. wolf, B. wolfs, C. wolves, D. wolfes, During the excavation, archaeologists discovered _____ remarkably well-preserved wooden structure beneath the soil., A. a, B. an, C. the, D. some, Many desert animals protect _____ from extreme temperatures by remaining underground during the day., A. them, B. themselves, C. their, D. theirs, The university encourages _____ of international students in research programs., A. participate, B. participations, C. participatory, D. participation, Although the two species are closely related, _____ habitats are quite different., A. them, B. theirs, C. their, D. they, Several _____ of tropical fish can survive in water containing very little oxygen., A. species, B. specieses, C. specie, D. speciei, The development of modern antibiotics was one of _____ most important advances in twentieth-century medicine., A. a, B. the, C. an, D. some, Young children often depend on _____ parents for both physical and emotional support., A. theirs, B. them, C. they, D. their, Scientists have discovered that some _____ can remain dormant for hundreds of years., A. seed, B. seedes, C. seeds, D. seeding, The museum's collection includes several objects from _____ ancient civilization that once occupied the region., A. an, B. a, C. some, D. no article, Each of the researchers recorded _____ observations independently before comparing the results., A. theirs, B. his or her, C. them, D. they, Because of extensive habitat loss, several populations of _____ are now protected by law., A. wildlife, B. wildlives, C. wildlifes, D. a wildlife, The scientist and _____ assistants spent three months collecting samples in the rainforest., A. she, B. hers, C. her, D. herself, _____ of accurate measurements is essential to the success of the experiment., A. Collect, B. Collected, C. Collectively, D. Collection, When a whale surfaces, _____ must breathe before returning underwater., A. its, B. it, C. itself, D. theirs, The researchers studied _____ behavior of several species living near the volcanic region., A. the, B. an, C. a, D. one, One of the most significant _____ of the expedition was the discovery of a previously unknown cave system., A. discover, B. discovering, C. discoveries, D. discovery, The committee praised the two _____ for their contributions to the project., A. researcher, B. research, C. researcher's, D. researchers, Many traditional societies developed _____ own methods for preserving food., A. them, B. their, C. theirs, D. themselves, _____ Pacific Ocean covers a larger area than any other ocean on Earth., A. The, B. A, C. An, D. No article

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