相关试卷
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1、 （物候学） is the study of seasonal biological events.
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2、 The loss of keystone species can disrupt ecosystem i.
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3、 Wetlands are c with water purification and flood control.
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4、 Sudden temperature f can stress marine life in coral reefs.
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5、 The a of spring triggers plant blooming and animal reproduction.
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6、 Migratory birds follow a strict t to coincide with seasonal food availability.
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7、 The i of climate change on ecosystems is becoming increasingly evident.
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8、 So severe ____ the habitat loss that many species are now endangered.A、is B、are C、was D、were
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9、 The documentary, ____ by a renowned filmmaker, exposed the plight of endangered species.A、producing B、produced C、to produce D、having produced
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10、 If we ____ more resources to conservation earlier, the crisis would be less severe.A、invest B、invested C、had invested D、would invest
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11、 The Amazon Rainforest, ____ destruction continues, is a vital carbon sink.A、who B、whom C、whose D、which
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12、 Not until the wetland was destroyed ____ the public realize its importance.A、did B、does C、has D、had
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13、 The conference on biodiversity, ____ last month, highlighted urgent conservation needs.A、holding B、held C、to hold D、having held
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14、 ____ by pollution, the river ecosystem is struggling to recover.A、Affected B、Affecting C、To affect D、Having affected
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15、 It is crucial that we ____ immediate action to combat climate change.A、take B、took C、will take D、had taken
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16、 The research team, ____ focus is on coral reefs, discovered a new species of fish.A、which B、whose C、that D、whom
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17、 Had the government not implemented strict laws, the ecosystem ____ irreparably damaged.A、would be B、would have been C、is D、had been
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18、 ____ agriculture aims to preserve natural habitats while feeding the population.A、Harmful B、Eco-friendly C、Traditional D、Modern
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19、 The Arctic tundra is ____ by oil exploration and melting permafrost.A、Protected B、Endangered C、Improved D、Studied
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20、 ____ like pollination have significant economic value.A、Natural benefits B、Human activities C、Industrial products D、Urban development