Is this class useless for the MCAT?

My priority classes to take are of course genetics, organic chemistry, biochemistry, and physiology, but all these classes are currently full. Well, organic chemistry is a different story. Only Organic Chemistry II is offered in the Spring Semester, and I didn't take I yet. I was then going to go with Microbiology or even Immunology, but they're both filled too for now ...

I'm wondering how useful - if at all - Human Biology would be based on the syllabus? What do you think from your...

Is this class useless for the MCAT?