Polyoma vaccine does the Polyomavirus. It’s recommend that parrots get this vaccine yearly.
I believe the answer is comparative anatomy. It is the study of the similarities and differences in the structures of different species. Similar body parts may be homologies or analogies, such that both provide evidence of evolution. Similarities in embryos are evidence of common ancestry. For example all vertebrates embryos have gill slits and tails.
If an anthropod does not change it's form except for increasing its size, this change would be considered an incomplete metamorphosis.
The bladder is the muscular organ that holds urine
