They are all animals
Wings.
All animals have to go throw pregnancy first which is common in all female animals.
They all eat have eyes or
Deserts occur on all seven continents and there are no animals common to all.
2 common animals are the raccoon and the bear
Teeth because all animals need to chew their food.
All animals in antarctica have fat deposit under their skin.
they all have brains
Yes, of course. Cockroaches are one of the most common animals in the world, and are found in almost every country, if not, all.
Cell walls !
they are animals and that's it
they are all animals
Genitals