Ciro Santilli @cirosantilli 34

Name origin: amnion, a pellicle that covers embryos of both eggs and also during pregnancy.

Includes:

Does not include amphibians. If you include them, you have the tetrapods.

It is quite mind blowing that this is polyphyletic on mammals and birds, what can't parallel evolution achieve??

The second protein to have its structure determined, after myoglobin, by X-ray crystallography, in 1965.

Breaks up peptidoglycan present in the bacterial cell wall, which is thicker in Gram-positive bacteria, which is what this enzyme seems to target.

Part of the inate immune system.

It is present on basically everything that mammals and birds excrete, and it kills bacteria, both of which are reasons why it was discovered relatively early on.

All non-clade groups are evil. All non-clade terms must be forgotten. Some notable ones:

Basically mean that parallel evolution happened. Some cool ones:

This being a class is bullshit because it is not a clade, notably birds are not considered reptiles, but they are clearly in the clade.

Includes:

The exact relationships between those clades is not very clear as there's a bunch of extinct species in the middle we are not sure exactly where they go exactly, some hypothesis are listed at: en.wikipedia.org/w/index.php?title=Tetrapod&oldid=1053601110#Temnospondyl_hypothesis_(TH)

But at least it seems rock solid that those three are actually clades.