A fully grown tadpole of frog respires through

• A) Gills
• B) Skin
• C) Lungs
• D) Tail fin
• E) All of the above

A fully grown tadpole of a frog primarily respires through A) Gills. However, as they develop into adult frogs, they transition to using lungs for breathing. It's important to note that tadpoles can also absorb some oxygen through their skin, but gills are their main respiratory organs during the tadpole stage.

Respiratory Methods in Tadpoles

• Gills: The primary method of respiration in fully grown tadpoles.
• Skin: Some oxygen absorption occurs through the skin.
• Lungs: Develop later as they mature into adult frogs.

In summary, while gills are the main respiratory organs for fully grown tadpoles, skin also plays a minor role in oxygen absorption.