Question

Presence of gills in a tadpole indicates that:

• A. Fishes evolved from frog like ancestors.
• B. Frogs will have gills in future.
• C. Frogs evolved from gilled ancestors.
• D. Fishes were amphibious in the past.

Answer 1

The correct option is C Frogs evolved from gilled ancestors.

Frogs being amphibians breathe through their lungs on land and with their moist skin underwater. However, early tadpoles of frogs do not have lungs. They possess characters similar to fish such as gills (to breathe underwater) and tails (for swimming). These common structures indicate that frogs evolved from fish like ancestors with gills.