@ziggyandjazzy most schools do ask for your fall transcript and usually have a deadline for them prior to decisions being released (not all schools, but many). I believe it probably varies greatly on how much impact they have on the decision. For example, UGA's deadline for fall transcripts is usually right around the time decisions are released, it's unlikely they consider those transcripts too heavily because they have already made most of their cuts at that point. They may use them more for those applicants who are borderline in order to make a final decision. Also, schools who do interviews have mostly made those offers well before fall grades are out, so they at least will not be considered for interview invite decisions in most cases.
As far as research you did for a class - what type of research? Was something from it published or presented at a conference or scientific meeting outside of the school? This is just my opinion, but basic research is included in a lot of coursework, so unless it was atypical of a class (practical research to contribute to a larger project or that was accepted/utilized in the scientific community) then I would not list it as research.