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Solution


Q.

Which of the following respiratory organs are present in spiders and scorpions
 a) Book lungs             b) Gills               c) Gill books             d) Lungs
1 A
2 B
3 C
4 D

Ans.

(a) Book lungs are named so because their folds resemble the leaves in a book. In this, the exchange of gases takes place between the interlamellar spaces and the venous blood through the thin membranous walls of the lamellae.