It depends which test you have. Some DATs seem to have a handful of ebio questions, others have none. Either way I would recommend you learn them. If you really focus it wont take you that long to get the info down 👍
You dont have to memorize every class of every phylum, just the ones that seem important. I just knew all phylums that were stressed in the destroyer and i got all my phylum questions right (had 2 i think).
Yea I agree its to mucht o memorize everything when I went through destroyer I saw the same one over and over being stressed so I figured they were important