<p>For the maple trees one:
Maple trees in a forest are an example of:
The choices were population, community, and some others…</p>
<p>The correct answer is population</p>
<p>@ccer222 I couldn’t agree more with you about the chloroplast, but I thought the h-bonded question was worded fine. I’ll double check tomorrow when I see the exam. It was double the amount of light, so I put double the amount of absorbance in lambda0 with respect to lambda1. The vegetation question was temperature and precipitation</p>
<p>@violinplayer: I put cristae as well for the chloroplast question. I’ll clarify haha:
Bacterial resistance question was asking which best accounts for some strains of bacteria to be resistant in response to antibiotics. Maple tree question was asking which taxa it belonged to. Not sure, but I think the hemophelia question was an “all of the following except” question about its inheritance.</p>
<p>LOL, still didn’t remember these questions. XD</p>
<p>Oh well. Do we officially know our scores this Friday or is it the 10th?</p>
<p>I still think only I and II are false and that increased ventilation and decreased PCO2 will increase the blood pH</p>
<p>The answer to the adaptive radiation was the one with “new/different niches” right?</p>
<p>Friday! 3 more days, I hope it’s in the morning so I can wake up and check before I go to school. =P</p>
<p>i was under the impression that only mitochondria had cristae? and the maple tree one was most likely population, restriction enzyme one was more prone to lysis. </p>
<p>here are some other questions i had:
why is the log one water? wouldn’t prokaryotes (or whatever the wording was) also influence it? </p>
<p>and what is the answer to the amlyopectin, glycogen one? i can’t find the answer anywhere online…</p>
<p>what is the explanation to the marathon one? </p>
<p>and why is the kin selection one II and IV???</p>
<p>I put increased intrapulmonary pressure, and increased 80 pressure thingy unit.</p>
<p>It wasn’t kin selection, it was reverse altruism! Which means it CAN be non-kin, and the other choice is as long as the other specie can help you back, you will help it back? Or it was if the other specie doesn’t help you back, you won’t help it.</p>
<p>tetanus results from repetitive stimulation tho…</p>
<p>So will the first question be thrown out?</p>
<p>@violinplayer i’m pretty sure that tetanus question one was a, the one with the length of the muscle. i’m not sure why but it’s the only one that made the most sense. don’t remember the entire answer.</p>
<p>i’ve never officially heard of a question being thrown out but i do hope they consider it</p>
<p>I just know that I picked A.</p>
<p>So do you have an IM that we can talk the USABO?</p>
<p>“Starvation & steroids: Inducer?”
I put down Negative feedback. It was fairly straightforward. Starvation triggers steroids so that the metabolism of something in your body returns to a setpoint. Definition.
(What is an inducer, anyways, I just get this from the Wiki <a href=“http://en.wikipedia.org/wiki/Inducer[/url]”>http://en.wikipedia.org/wiki/Inducer</a>)</p>
<p>shoot. I put mitochondrial cristae for lowest ph (ph5 compared to lysosome ph4.5 apparently?)</p>
<p>“Adipose tissue is connective.”
Yes this is true but the reasoning behind it was irrelevant to it being connective and thus not a justification. I had to put “every statement is false” for that question IIRC.</p>
<p>@ #1 being grammatically incorrect. I noticed that as well but it was the only choice to make… Maybe the cutoff wil decrease by 1 accordingly? :)</p>
<p>“and what did you guys put for the most important factors for plant growth? latitude and temperature or soil and precipitation.”
It was temperature and precipitation, I thought… All climatograms have those two, and those two are what I jumped to.
<a href=“http://www2.kpr.edu.on.ca/cdciw/biomes/Phoenix%20Zoo/climatogram.jpg[/url]”>http://www2.kpr.edu.on.ca/cdciw/biomes/Phoenix%20Zoo/climatogram.jpg</a></p>
![http://www2.kpr.edu.on.ca/cdciw/biomes/Phoenix%20Zoo/climatogram.jpg[/url]](http://www2.kpr.edu.on.ca/cdciw/biomes/Phoenix%20Zoo/climatogram.jpg%5B/url%5D){kind=link}
<p>“and what is the answer to the amlyopectin, glycogen one? i can’t find the answer anywhere online…”
This question can be inferred with logic and evolution between flora and fauna… Amly had to come before glyco.</p>
<p>“Adaptive radiation in Darwin’s finches: C – sudden diversification”
I don’t remember the answer choices but this sounds fishy… But then maybe the other choices were even more sketch-sounding. </p>
<p>“Evolution: Allele frequencies”
I thought natural selection only worked on the phenotype and had no direct impact on the genotype; thus the answer would’ve had to be the one related to fitness and traits.
[url=<a href=“http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/Evolution.html]Evolution[/url”>http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/Evolution.html]Evolution[/url</a>]
“The forces of natural selection act on phenotypes, but only if there is a change in the genotypes of a population has evolution occurred.”</p>
<p>This doesn’t look good for me, ack. Yes there is some overlap between my post and the past 2 pages. Sorry about that, inputting my opinion anyways.</p>
<p>Has the cutoff ever been 30+? Compared to the 2010 Open Exam, this exam felt easier (although I have maintained by proneness to making mistakes). Some questions did seem tricky though, even if they appeared trivial.</p>
<p>For example, there was a question about natural selection being the cause of evolution. I believe E said something about it being the driving force of evolution, which was pretty much a restatement of the question. I put genotype frequencies for this one, but I really was unsure.</p>
<p>Another question had something about plants growing vertically and which of the following being the most competed for. I put light, even though the other choices, such as water and air, were also competed for and you could have chosen E for all of the above. My reasoning was that air, for one, was surely not competed for due to its enormous availability. Also, the question specifically referred to vertical height, so it had something to do with just light.</p>
<p>The question about what distinguishes mammals also bothered me. I think I put I,III,IV,V because all of them were indeed traits that mammals had that other amniotes (reptiles) certainly did not. One choice I chose was about a four-chambered heart with complete separation of the pulmonary and systemic circuits, which seems right because reptiles, like crocodiles/alligators, have a four-chambered heart but not a fully formed septum. However, I ignored birds when I reasoned this out, and birds have a heart with complete separation.</p>
<p>About the starvation and steroids question, I might have overthought it when it was simply negative feedback. I put repressors, I believe, since it modeled a repressor operon. The problem is that operons only exist in prokaryotes, and I think the question was about humans.</p>
<p>Also, I agree with Blebbing that the bicoid gene is responsible for Drosophila embryogenesis.</p>
<p>There are a bunch of other questions that have not been mentioned, but I’m not remembering them well. Can anyone post more of the 2011 Open Exam questions they remember so we can discuss them?</p>
<p>Thanks!</p>
<p>how do i make my own thread?</p>
<p>so all of them are false…?</p>
<p>Well I have a copy of this year’s test. I’ll put up a link to it when I get the chance.</p>
<p>^ that would be really awesome!</p>
<p>hey Insorak- any chance we’ll get to see some semi-final exams before semis? :-)</p>
<p>My thoughts (most of these I missed myself, so I am not trying to advocate my own answer senselessly)</p>
<p>Log one: An invisible gas in the air. (?)</p>
<p>Explanation: If you look it up, CO2 produces most of the mass in a log; CO2 is an invisible gas in the air. However, I am not 100% positive of this because I forget whether it said dead tree or whatnot. </p>
<p>Completion of meiosis in males produces 4 spermatids: Only haploid </p>
<p>Explanation: It does not specific humans; spermatids does not necessarily imply humans, although Campbells does only use human diagrams for spermatids.</p>
<p>The graph of the arteries: Low High Low. </p>
<p>Explanation: Refer to Chapter 35(?) of Campbells or so. It is a graph. Also it is a previous test question.</p>
<p>Hardy-Weinberg question with n+1: 3n-1/4</p>
<p>Explanation: Let n = 1. The only feasible solution is 3n-1 / 4</p>
<p>It is definitely doubled absorbance.</p>