GMAT Sentence Correction (SC) | Re: Scientists believe that unlike the males of most species of

No, I would say e-gmat is 100% correct. If your example comes from e-gmat, I will say I'm wrong. My suggestion is you should follow reliable instructors, e-gmat is one of the most reliable instructors I've ever known.

First step, you should master the materials provided by your instructors. Next, you will tackle some "irregular" questions. Do not fall in "irregular" questions too soon if you haven't mastered your own materials(I do not mean you haven't mastered GMAT materials, I just give you an idea how to proceed