Completely random....it was all a product of "evolution" by a force of....well......lots and lots of time....and.....somethingorother.
No "God" was involved in making that!
Nosiree!
That fact that it cries out "Designed" is just delusion on the part of the "religious."
Yes, all the life on earth has so much sameness to it. Some think that the random process would have some strangeness and extreme diffrentness in the designs but NO!
So if complex structures, by their very complexity, require a designer, tell me who designed the designer?