Q.

Air capillaries of parabronchi are the sites of gaseous exchange in which among the following group  of invertebrates

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a

Reptilia 

b

Aves 

c

Amphibians 

d

Pisces 

answer is B.

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Detailed Solution

The unique features of birds are presence of air sacs and parabronchi, as they are without alveoli. So the air capillaries of parabronchi are the sites, where exchange of gases takes place

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