Question

Skin is a respiratory organ in
(a) lizards
(b) birds
(c) primitive mammals
(d) frog

Answer 1

Answer:

primitive mammals use skinas organ of respriation

Answer 2

(d) frog

Explanation:

Skin in fact is a secondary or accessory respiratory organ in frog. When frog undergoes the hybernation period or aestivation period i.e. winter sleep or summer sleep respectively and when it goes into the water for a long time frog respire through skin. The respiration through skin is called cutaneous respiration. Therefore the correction answer is frog.