**OFFICIAL** 2013-2014 AP Biology Thread

<p>@bobby12344‌ First off, I understand your point completely, I just want to point out that there wouldn’t be a 100% chance of every child inheriting the trait. MtDNA is inherited through the mother, yes, but heteroplasmy is a possibility because of the way that mitochondria reproduce. Because there can be multiple forms of the MtDNA in a cell, random genetic drift could lower the chance of certain traits being expressed by the children in contrast to the mother herself. I am in no way supporting the answer choice that you were disapproving. I just happen to be an absolute nut who thinks about things like mitochondrial heteroplasmy on a normal basis.
<a href=“The distribution of mitochondrial DNA heteroplasmy due to random genetic drift - PubMed”>The distribution of mitochondrial DNA heteroplasmy due to random genetic drift - PubMed;

<p>@Picarat‌ you’re talking about exergonic; <a href=“Exotherm - Wikipedia”>http://en.wikipedia.org/wiki/Exotherm&lt;/a&gt;&lt;/p&gt;

<p>it either says cold blooded organisms (which is what i’m hoping the grader understands as)
and the exothermic, which isn’t what I wrote. Exotherm and exothermic is different as @schakrab‌ stated, so I’m not sure if I’ll get credit on that. Do graders have pre-knwoledge of biology? If they do, they should mark exotherm okay… right?</p>

<p>Yeah…I put down exotherm and cold blooded and explained why it was so correctly. I hope they understand that and not penalize me for brain lapsing on two letters. But the college board generally doesn’t mind wrong answers if you say the right one on the FRQ’s as long as you don’t contradict yourself(i.e. saying that the organism was both ecto and endotherm. </p>

<p>I had form I. Do different forms get different questions or is the question sequence different?</p>

<p>@s3ni0r‌
Everyday course work is going to depend on your particular teacher. We are <em>supposed</em> to cover the same things nationwide since it’s an AP course, but the rigor is entirely dependent on your teacher. </p>

<p>In my particular class, there wasn’t a lot of “required” work that was due to the next day because our teacher didn’t want to grade anything. She put in a lot of participation grades and our class average was mostly based on labs and quizzes. </p>

<p>wait… is it true that for FRQ #1 we had to calculate the standard deviation and then the standard error for each population on our own, and then multiply it by 2 to get 95% confidence, and then use that to graph the error bars?</p>

<p>since when did this turn into a stats test. Our class never covered standard deviation. I get that its on the provided equation sheet, but seriously. My teacher has taught AP bio for 17 years and has never had to do a standard deviation thing </p>

<p>@remembrance what, no? the error bars was just 2x the SEM (which was 1 for all 3 means)</p>

<p>when does CB post scoring guidelines? I wanna see my terrible scores</p>

<p>@ivyhopes12 yeah, thats what i though. actually, that’s what my entire class thought. but then our teacher said you actually had to calculate standard error. apparently SE is not the same as SEM</p>

<p>Sure it is: SEM just means "Standard error of the mean1’</p>

<p>@ivyhopes12 i’m in class right now, and we’re going over the SEM question. i’ll let you know</p>

<p>It was populations 1 and 3. Since we are testing if the means are significantly different, we must check if the confidence intervals are independent. Since the confidence intervals in 1 and 2 overlapped, we cannot say with confidence that the two means are statistically different</p>

<p>An FYI- I asked my bio teacher, who’s an AP grader, about the curves/mult choice. CB can and may throw out random multiple choice or grid in questions, but NOT FRQ’s. Any form other than O was experimental. Their FRQs will have different guidelines, but there is NO DIFFERENCE between the curve on, say, form O than form D.</p>

<p>@lpreston‌ Thank you for letting us know. I’m dreading my awful score. </p>

<p>@bunnymonster lol im in the same boat brother</p>

<p>Watch College Board just throw out the 10 easiest questions because they are evil bastards </p>

<p>I’m fairly positive one of the grid ins will be thrown out. I had form O just like others in my class, but my grid in #1 was completely different from what they had.</p>

<p>hey guys!!! im really panicking right now… probably for no good reason… but i have two emails that i use… and my college board email account is hotmail something but i’m not sure if i entered the hotmail one or the gmail one on my answer sheet for ap!!! does this matter??? will i be unable to access my scores if my college board account email doesnt match the one on my answer sheet??</p>

<p>There might be some delay, but if you have your name and address on it, I think you should be fine.</p>

<p>I’m taking the AP Bio on the late test date, this Friday the 23rd.<br>
I just found out, after classmates took the regular test, that my Bio teacher taught the old AP curriculum. Besides freaking out/hyperventilating (I need a 5 for credit) I don’t know what to do now. Where can I learn enough info sufficiently to hope to have a chance at a 5?</p>