"Official" 2014 USABO thread

<p>@Bobby - I think the question was eukaryotic flagella, not bacterial. As I recall, it also mentioned cilia (which aren’t found in prokaryotes). Thus, microtubules was the correct answer.</p>

<p>@Lucky - The answer to the plant question was Ranunculus (E)
Allium - Garlic (a bulb is a modified stem with leaves - that’s why garlic and onion are layered)
Ananas - Pineapple (CAM Plant and has other weird leaf mods like suckers)
Opuntia - Prickly Pear Catcus (Spines)
Pisum - Pea (Tendrils)
Ranunculus - Buttercup (Nothing significant)</p>

<p>Btw what was not a function of stomata?
And regarding the synthesis of glucose from fatty acids, isn’t that still a debated question in biochem?
Also, operant conditioning was the answer to aggressive geese right. </p>

<p>Isn’t operant cond. reward and punishment?</p>

<p>Anyone know what they put for the question on the first page with the acetylcholine/acetylcholinesterase?</p>

<p>@Airbus689 In operant conditioning, behavior is modified by consequences. The geese may not have been as aggressive if that law hadn’t been implemented, but because the law was in place and the people weren’t allowed to scare the geese, the geese tended to be more aggressive and territorial (i.e. there would be no consequences). As for the question on the first page, I don’t remember, sorry…</p>

<p>Why would the geese be more aggressive/territorial when people stopped harassing them, especially during nesting season. If anything, the more they were harassed the more aggressive they would become.
Also, I don’t think “no consequence” at all qualifies for operant conditioning. Like, if there was a switch and a mouse pressed it and there came neither shock nor reward, why would it be an incentive to keep pressing it (or become more aggressive in the case of geese). Apathy I would understand, but not aggressiveness. </p>

<p>@elf4EVA Are u a Kpop fan…srry random question i know…</p>

<p>@elf4EVA Are u a Kpop fan…srry random question i know…</p>

<p>@Lucky139 It’s the fact that nobody’s stopping them from being aggressive. Initially, they’re probably more scared of us than we are of them, but once they find that we won’t harm them, their innate fear of humans diminishes somewhat and they think they can get away with things. At least, that’s how I thought about it. Do you know what the answer to that question was?</p>

<p>@Airbus689 Yep - Super Junior was my first kpop band, so I thought I’d dedicated my CC username to them haha… Are you into Kpop as well?</p>

<p>no idea what the answer is sadly </p>

<p>What distinguishes operant conditioning from classical is the nature of the response, that is in the latter form of conditioning the response is involuntary, arising from an association between two unrelated stimuli. In operant conditioning the behavior is linked to some form of reinforcement or punishment, which either strenghtens or diminishes the behavior. So that’s why I put operant conditioning.</p>

<p>What was not a function of stomata? The only answer that made sense to me went something along the lines of “contributes to the intake of most of the water from the atmosphere.”</p>

<p>@chessNBio I agree with you</p>

<p>I just heard that USABO extended the deadline to send in the tests because of the huge storm in the east. So, please edit or take down the answers. </p>

<p>bean, how did you know so much about those plants? Did you just memorize a lot of genuses or what? Thanks</p>

<p>it was a large part of camp
regarding overall taxonomy, campbells was suggested. </p>

<p>wow, lucky you’ve been to camp too?</p>

<p>Nah, just advice from bean and some other friends haha</p>

<p>Does anyone remember the question about the population curve and the position with the largest yield?
Was it the middle part of the logistic curve, or just the highest point? I was confused because it didn’t state maximum sustainable yield, just max yield. So… yeah. I know max sustainable would definitely be at K/2, but idk about max in general. </p>