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How do the gills of fish help them survive? . Research and write your answer. Gills allow fish to use the oxygen dissolved in the water. . Which of the birds adaptations helps them fly? ( Think about about their structure and write it down.). Birds have hollow bones, so they are lighter.
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How do the gills of fish help them survive? Research and write your answer
Which of the birds adaptations helps them fly?(Think about about their structure and write it down.)