What did male birds do that made god decide that 97% of them did not deserve to have a penis?
- Bulldog reduxLv 72 weeks ago
I know why 50% of them have no penis. Can you guess?
- KennyLv 71 month ago
They grew legs so it wasn't funny anymore .
- JazSincLv 71 month ago
o Have ancestors that got by with cloaca
o Fly. Some things aren't very aerodynamic.
- Anonymous1 month ago
If you believe in god, then you are not supposed to question his motives. OTOH, if you are interested in a scientific explanation, then it is just the way they evolved. Birds evolved from a reptile, and if we look at living reptiles, we see that their penises are different. For example, lizards and snakes have a pair of them, and turtles and crocodilians have a centrally located penis, while the tuatara, the closest living relative of lizards and snakes, has none. Therefore scientific evidence suggests that the earliest reptiles probably did not have a penis, and it has evolved multiple times in evolutionary history.
We do not know if the common ancestor of all living birds had one but that it has been lost in some but retained in others, or if that common ancestor did not have one but then it evolved in some birds but not others. Scientists do not have all the answers. It will require some good scientists to come up with new evidence to allow us to come up with good explanations. Before then, scientists will likely disagree as to how the penis evolved in birds.
We do know that all living birds evolved from the small number of species that survived the end of Cretaceous mass extinction that wiped out all dinosaurs and all enanitornithine birds. The survivors were the paleognaths and the shorebirds. Paleognaths (ancient palette) are birds like the tinamous and the ratites and they do have penises. OTOH, the shorebirds, such as seagulls, do not. Most living birds, including the familiar songbirds, hawks, water birds, ducks, and chickens, evolved from the shorebirds, but only some of them, such as ducks and geese, have a penis The chicken is a rather close relative of ducks, and scientists have found that chicken embryos have the tissues that would have developed into a penis but it was then destroyed by a gene that causes cell death. Unless the same tissue can be found in birds other than chickens and quail, we cannot assume that other living birds had a penis but lost it. That would suggest to me that the paleognaths had an ancestor that had a penis, but the shorebirds likely did not. That means the penis has evolved at least twice in living birds in all likelihood. Scientists can decide that question by examining the developmental pathway and genetics of the penis in paleognaths and ducks. If the developmental pathways or genetics are different then we can safely conclude that these two groups of birds evolved their penis independently. If however, the developmental pathways and genetics are the same then it is most likely that the common ancestor of all living birds had a penis but it has since been lost in some species but retained in others.
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- daniel gLv 71 month ago
Technically they do have a penis, you just haven't learned that yet, or sleeping through biology.