Question

Most vertebrates have _______.
Fish respire through _____.
The air in the alveoli is called ___ air .





please help me ​

Answer 1

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1. Most vertebrates have two pairs of limbs.

2. Fish respire through gills.

3. The air in the alveoli is called alveolar air.

Answer 2

Answer:

supportive internal skeleton

Fish gills

alvoli.......