<p>does anyone remember the dates for the geologic time period question? I think I put carboniferous, devonion, or permian because I remember it was like 400 or 300 mya</p>
<p>Damit, I actually think I got somewhere between 20-30. Literally every question that I was 50/50 on I got wrong ._. .</p>
<p>this year’s olympiads have not been going well, in terms of cutoff. Cutoff for AIME on the AMC12A was 94.5, up from 93 last year. Cutoff for USAPhO semis was 15.5, up from 13.75 last yr. 
last year’s USABO open cutoff was a 29 so…</p>
<p>according to wikipedia: The extra X chromosome is retained because of a nondisjunction event during meiosis I for klinefelter’s</p>
<p>Was the answer to the Fick’s law Q not increased surface area?</p>
<p>@Filament: A mentioned good physical abilities; C mentioned the word “courtship” and mentioned showing off good genes (didn’t mention physical abilities)</p>
<p>Additions:</p>
<ol>
<li>Amino acid that transported water: Asparagine</li>
<li>A question about birds vs. mammals</li>
<li>A question that asked which of the following is NOT a plant adaptation in the grassland.</li>
</ol>
<h1>468 What’s to ■■■■■? I know how I did with the exam, and I thought it was too easy. Given how many teachers, not just students, are saying it was too hard, I guess it’s fortunate my suggestion to make the test harder wasn’t followed.</h1>
<p>Y’all have the island biogeography question wrong. When the question has the word “DEFINITELY” all caps, be wary of undefined variables (distance and size).</p>
<p>Huh? I’m 100% certain that we wanted large and closeby island… As I said, if you’re not trolling, sincere congrats to you.</p>
<p>Btw, how’d you do last year? Were you a finalist whom I do not know well?</p>
<p>Regarding adaptations in the grassland: not true is that trees store wT mostly in the roots and their trunks have little Suberin</p>
<p>For the western blot, the composition answer may be right, now that I think about it. It depends on whether the proteins have thee exact same mol weight. If that is the case, it is still isoelectric focusing.</p>
<p>I think the answer to the monocot vs dicot one depends on whether they were talking about what do monocots have that dicots don’t. For some reSon, I remember the problem stAtement being the reverse.</p>
<p>The virus one: the virus was causing an overabundance of hormone. The answer was definitely PTH.
I put the composition for the Western blot and the path length for the gills/alveoli, but both were just educated guesses.
For the zebrafish larvae, I put Paramecium because that’s the main food source of zebrafish larvae, but it might have been yolk sac. I don’t remember what age the zebrafish larvae were supposed to be.
The first amino acid question was serine, the second was the only polar one (I don’t remember the choices or my answer).
The answer to which hormone does not match function was mineralocorticoids for sure.
41. I put A, and I Wikipedia’d it right after, and it seemed right.
The birds vs. mammals was the one about breathing, I think.</p>
<p>@darksigma: was there a choice for surface area? if not, I may have picked path length in lieu of thinking in terms of surface area.</p>
<p>For the aleurone question, it asked which was false. The answer choices named various structures stating whether both dicots and monocots had it or only one had it.</p>
<p>@Filament and everyone else: A mentioned good physical abilities; C mentioned the word “courtship” and mentioned showing off good genes (didn’t mention physical abilities)</p>
<p>Does anyone remember the actual question on bird classification? The one about wing muscles or something?</p>
<p>About the carnivorous plant question, it should be limited to insects. They aren’t…carnivorous plants can trap rats.</p>
<p>for problem 1, surely it Chlorine defuses easier than sucrose</p>
<p>^the answer wasn’t that it was limited to insects. </p>
<p>zebrafish was 5 days after fertilization -> google source said “to not feed them because yolk is sufficient”.</p>
<p>anyone know the aluerone one? i think another choice was “seeds of mono/dicots have pericarp”. and the other choices involving coleorhiza/coleoptile/radicle were all true I believe.</p>
<p>dicots dont have coleoptiles do they?</p>
<p>im pretty sure the dicots vs monocots one was the aleurone layer</p>
<h1>528 Didn’t participate last year.</h1>
<p>For the western blot, sure you could make an argument that by adjusting the gel composition (and then running like a 10 meter long gel) maybe you could get proper separation. You could. But you shouldn’t. </p>
<p>In general, if a question has an ‘obvious’ answer, but also another answer that you could argue, through a silly convoluted path, technically fulfils what’s being asked, don’t do it. You’ll be marked wrong, and any sense of superiority you have for having ‘beaten’ or ‘tricked’ the test will be worth nothing. Unless something is explicitly, factually wrong and you have time and opportunity to raise the issue, don’t try to be smarter than the test. </p>
<p>Not saying that happened here, just general advice.</p>
<p>@darksigma: was there a choice for surface area? if not, I may have picked path length in lieu of thinking in terms of surface area.</p>
<p>For the aleurone question, it asked which was false. The answer choices named various structures stating whether both dicots and monocots had it or only one had it.</p>
<p>@Filament and everyone else: A mentioned good physical abilities; C mentioned the word “courtship” and mentioned showing off good genes (didn’t mention physical abilities)</p>
<p>@MasterYster:</p>
<p>For the phospholipid bilayer membrane diffusion one, it was chloride ion, not chlorine. In any case, I don’t remember “CO2 > glycerol > chloride ion > sucrose” being a choice. Please correct me if I’m mistaken.</p>