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SAT Biology Study Material: Certification Test 777

Gaseous exchange in Animals Learning App & e-Book: MCQ 777

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MCQ: 777

Trachea is supported by C-shaped rings of cartilage to kept it

  1. close
  2. elongate
  3. open
  4. strong

Gaseous exchange in Animals Study Material: SAT Biology App & eBook Notes

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Gaseous exchange in Animals Notes App (iOS & Android)

Gaseous exchange in Animals Notes App

College Biology Notes App (Android & iOS)

College Biology Notes App

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