I suspect that both you and your extended family members did take a biology course in high school. I vaguely remember taking one but I, like most of my fellow high school students, probably slept through it.
Now maybe evolutionary biology is not required, but clearly some biological science class must be taken and undoubtedly it was. I suspect that California may define biological sciences in the same broad way the judge defined "establishment of religion"
Go check your transcripts.
As a matter of fact, I just did, since I keep my transcripts fairly handy, right where I store my birth certificate and my DD-214, although there was no need--I remember quite well how pleased I was to discover I could go right ahead with chem and physics, and avoid biology.
Where's the leverage in this argument, anyway? For it to matter, you have to provide a convicing argument that evolutionary theory is a religious theory of a well-established religion opposed to the notion of the existence of a prime mover God, which has not been done. A tiresomely repeated statement to the contrary notwithstanding. Evolutionary theory has nothing to say about the existence, or non-existence of God, so making evolutionary theory a state requirement for graduation does not a case against God in the curriculum make.