Question

A fully grown tadpole of frog respires through
A) Gills
B) Skin
C) Lungs
D) Tail fin
E) All of the above

Answer 1

Hint: Tadpoles are herbivorous; feed on soft plant matter that decays. The stomach of most tadpoles is lengthy and spiral-formed and can be seen from the bellies of many animals to easily absorb organic matter.

Complete Answer:
The life cycle of most amphibians involves an embryo-adult larval period that is intermediate. Frog tadpoles are mainly herbivorous, while Caecilian tadpoles and Salamander are carnivorous.

Now, let us find the solution from the options-
- Through shifting the throat by repetitive rhythmic motions, known as pulsing, tadpoles breathe via the gills. They can breathe from their lungs as well. They finally lose their gills as they undergo metamorphosis into frogs, and begin to breathe via the lungs or via the skin.
- Tadpoles of toads and frogs with an internal gills and laterally compressed tail are typically globular. Anuran tadpoles possess external gills that are gradually enclosed by skin when they are first hatched. Thus, option B is not the correct option.
- Tadpoles have certain characteristics including a lateral line, gills, and tails that may not be seen in adult amphibians. The diet of tadpoles varies when they undertake metamorphosis and they can begin to breathe oxygen. Thus, option C is not the correct option.
- A frog tadpole develops, with the back legs rising first and the front legs second; it gradually grows its limb. The tail is consumed through apoptosis into the body. As the legs begin to expand, lungs grow around the moment, and tadpoles will sometimes swim to the water and gulp air at this point. Thus, option D is not the correct option.

Thus, the correct answer is option (A) Gills.

Note: It should be predicted that fossil tadpoles would not survive, with no hard sections. Traces of biofilm, however, have been retained and fossil tadpoles dating back to Miocene have been discovered.