Frogs (class response)

I wasn't in school the day the frog dissection took place, but I learned a lot about frogs. Some things I learned about frogs is that they have gills when they are tadpoles and get lungs as they grow up into mature frogs, sexual reproduction happens outside of the body, and I also learned that frogs do not have any passages that would define them a male from a female. Frogs have one passage was for the wastes and sex cells which is the cloaca. The cloaca leads to the outside body. I also learned that male have a vestigal oviduct that serves no purpose. My question is, why do male frogs have a vestigal oviduct if they don't need it, and why do they have it if they don't produce eggs?

http://www.newscientist.com/article/dn13342-prehistoric-frog-from-hell-hints-at-ancient-land-link.html



-Sometime in February, researchers found a prehistoric frog that was very big. The drawing above is a drwing that showed what the frog or toad might have looked like. It was very big compared to a mantidactylus guttulatus. This frog was found in the country of Madagascar.
-Scientists believe that this frog is a toad because of its size. This abnormal amphibian lived about 120 million years ago.
-Scientists believe that this amphibian lived in the desert because of its color of skin.
-The frog or toad is 40 centimeters long.

My opinion about the topic about frogs, is that frogs are animals that have lived since a long time ago. This is important because we can find out more and more about how frogs came to be currently, and how they transformed to be be so small. Discovering and learning about prehistoric animals is extremely important because we would find out how animals are today. We can also examine the environments that they lived in. We also can compare the prehistoric animals to animals in the same phylum today, so we can find out which animal has descended from this prehistoric animal. In conclusion, I think that prehistoric animals are very important and will probably help answer questions about our enormous ecosystem.