Question: 175. Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs.
Choose the correct answer from the following :
(1) The statement is true for water but false for land
(2) The statement is true for both the environment
(3) The statement is false for water but true for land
(4) The statement is false for both the environment
Answer: Option (3)
Explanation:
In frogs, respiration occurs through different organs depending on the environment.
When frogs are in water, respiration takes place only through the moist skin, which is called cutaneous respiration.
The buccal cavity does not participate in respiration while the frog is submerged in water.
On land, frogs respire through skin, buccal cavity, and lungs.
Buccopharyngeal respiration occurs through the moist lining of the buccal cavity when the frog is at rest on land.
Lungs are also actively involved in respiration on land.
Therefore, the statement is false for water but true for land.
Hence, the correct answer is Option (3).