1.

Fill in the blanks.1. Respiration is the process essential for ______ of living things. 2. Inhaled air has ____ oxygen and _____ has carbon dioxide. 3. ______ can breathe both with lungs and skin. 4.The latest respiratory disorder is

Answer»

1. survival 

2. more, less 

3. Frog 

4. COVID- 19



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