May-2012- Biology (E/M)

<p>Oh those were from the graph about CO2 uptake from three different types of trees. THe question asked how much CO2 the one tree was taking in if it had three leaves. The answer was 1000 because for the units on the y-axis they divided by the surface area of the leaves so you didn’t have to multiply by three. We did that exact lab in my AP Bio class.</p>

<p>anyone want to guesstimate what the curve will end up looking like? Really thinking about cancelling, but if this was a ridiculously hard test then staying around for the curve is tempting…</p>

<p>for the bacteria concentration one, would it be 10x greater or 20x greater. I used my pencil kind of as a straight edge and the point was slightly above the line the point that would for sure make the answer 10x greater.</p>

<p>Do you know what letter choice was the resistance choice for penicillin? What were the rest of the choices on the question?</p>

<p>It was much closer to 10x than 20x from what I remember.</p>

<p>anyone remember on e when it talk about the 3 leaves in a certain light</p>

<p>i remember putting 10x for that question, and for the I II II question on M about the dialysis bag, i put I only (i forget what I was) but I remember the other two choices: it was isotonic (which is false because one side still had all that fat and amino acids and other solute that couldn’t diffuse) and that the molecules stopped moving or something like that (which is wrong because at equilibrium, diffusion is still occuring but the concentration is staying the same.</p>

<p>I agree with infrapods. So have we reached a consensus about what is necessary for successful sexual fertilization? Also regarding the genetics ques. on M, sepia heterozygous vs. recessive hom. was 50%?</p>

<p>I totally forget the 10x one? What did that have to do with?</p>

<p>Did any of you get 100x for an answer? (might have been the bacteria-urine one?)</p>

<p>@Chinaboys wait hang on, what consensus was reached about what’s necessary for successful fertilization?</p>

<p>lauren926: thank you! yayy got that question, we did that in my ap bio class too :slight_smile:
azog : the answer to the 3-leaf problem was 1000.</p>

<p>I don’t remember this question with the leaves and the bacteria urine one as well. Was it on the ecology section?</p>

<p>Bacteria-urine was on M section. But the leaves isn’t ringing a bell. I know I got 100x for an answer on the bacteria-urine one.</p>

<p>No, i was wondering if there was a consensus. So I believe the majority believe that it was haploid gametes…sucks since I believed that polyploidy was an exception. Looking more into it, polyploidy is technically not sexual fertilization</p>

<p>Wait could someone remind me what the bacteria-urine one was? I only remember the one with a graph and asking how many times more day like 12 had compared to like day 3.</p>

<p>EDIT: i think the one im talking about is the graph that showed how much bacteria was found in the urine, there was another question on bacteria with 10x or something like that?</p>

<p>@arthropods, It was day 12 compared to day 4, 10^5 is 10 times greater than 10^4. I think mysteiny is wrong ;(</p>

<p>lol at arthropods haha but yea i got 10x for that question and i realized that the other question was the leaves and co2 which was probably on E so problem solved</p>

<p>at honana wow I’m so done right now, I thought the graph showed the statistic per a leaf so I multiplied by three and got 3000 -_-</p>

<p>@infrapr0ds, my bad! still in the bio mood…
Anyone have any thoughts abou the sepia fly question homozygous vs. heterozygous on Molecular?? was it 50% have sepia?</p>

<p>yeah i got 50% on that one because it all depends on whether the heterozgous one gives the sepia or red allele</p>