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2014Chevy 2014Chevy
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4 years ago
Which of the following is a specific defence mechanism?


acid secretions of the stomach


antibodies


mucus in the respiratory tract


skin
Textbook 
Biology: Exploring the Diversity of Life

Biology: Exploring the Diversity of Life


Edition: 4th
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sdicris1828sdicris1828
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4 years ago
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