NEET Zoology (general) MCQ Question
Which of the following statements about the respiratory and circulatory systems of frogs is correct?
Frogs utilize both lungs and skin for respiration during different physiological states.
The heart of frogs consists of four chambers, facilitating complete separation of oxygenated and deoxygenated blood.
Frogs only rely on pulmonary respiration when active and do not use their skin for gas exchange.
The vascular system of frogs is an open type, allowing for free flow of blood into body cavities.
Correct Answer
Detailed Explanation
Frogs employ both lungs for pulmonary respiration and skin for gas exchange during aestivation and hibernation, as detailed in the NCERT context. They have a three-chambered heart, not four, and their vascular system is closed, not open.
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