**Official AP BIO 2012 Thread**

Test Preparation AP Sciences
241

<p>is anyone else taking a physics exam after the bio</p>

<p>TWO aps in one day ■■■…</p>

242

<p>Hey, I’m taking AP Bio as well. I need some input: if I read through Cliffs, take the practice tests, and take some official tests, then is that will be enough for a 5? I’ve had a 100 all year in the class, but I’m worried that I’ve forgotten a lot of the important stuff.</p>

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<p>@StudiousMaximus
Yeah that should be enough. But why are you asking this now? It’s a bit late to start…</p>

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<p>@HumorMe: thanks. Turns out I stumbled upon a source. (I couldn’t find it when I was looking for it). In case anyone else wants to see: [AP</a> Practice ?Prepare with AP Questions](<a href=“College Board - SAT, AP, College Search and Admission Tools”>AP Exam Practice – AP Students | College Board)</p>

<p>"Beginning with the May 2011 AP Exam administration, there will be a change to the way multiple-choice scores are calculated.</p>

<p>Total scores on the multiple-choice section are based on the number of questions answered correctly. Points are not deducted for incorrect answers and no points are awarded for unanswered questions."</p>

<p>@RedSnow, maybe he is taking the “make up” one.</p>

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<p>@RedSn0w: It’s not as if I’ve just started studying. That’s just my complete plan (and some of it is already done). Besides, I’m an extremy quick study.</p>

246

<p>@wanderlustful: thanks for the elucidation!</p>

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<p>guys, i have 3 questions in cliffs second test:
<a href=“http://i49.■■■■■■■.com/5ywb9i.jpg[/url]”>http://i49.■■■■■■■.com/5ywb9i.jpg&lt;/a&gt; why is the answer in this one D? I solved it E. Shouldn’t a parasite live on the host? If it laid its eggs on it or something, isn’t that a parasitoid?
and <a href=“http://i50.■■■■■■■.com/2rraq07.jpg[/url]”>http://i50.■■■■■■■.com/2rraq07.jpg&lt;/a&gt; I don’t get any of this one lol
and this is the title for the question: <a href=“http://i45.■■■■■■■.com/4qg7c3.jpg[/url]”>http://i45.■■■■■■■.com/4qg7c3.jpg&lt;/a&gt; and the question itself: <a href=“http://i45.■■■■■■■.com/sl3ckz.jpg[/url]”>http://i45.■■■■■■■.com/sl3ckz.jpg&lt;/a&gt; why is the answer E and not A?</p>

248

<p>@jasonjackson789
first question) i can see why it is D since the bird invades the host’s environment(some cases that would be the body but in this case it is the nest) and causes harm to the host(killing it’s offspring) but i still would think E is a better answer</p>

<p>75) C
76) D
89) E because the null hypothesis is the default one or what one expects to occur (there is no certainty that the experiment is controlled)</p>

249

<p>Does anyone know what years the AP biology exams have been released?</p>

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<p>@eunhae
<a href=“https://myportal.bsd405.org/personal/raoj/apbiorao/AP%20Bio%20Released%20Exams/Forms/AllItems.aspx[/url]”>https://myportal.bsd405.org/personal/raoj/apbiorao/AP%20Bio%20Released%20Exams/Forms/AllItems.aspx&lt;/a&gt;&lt;/p&gt;

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<p>Took one of the previously released exams and got an 80/100 for multiple choice, which included six questions that I just missed. The last five questions were really confusing ones regarding the PCR if anybody knows which one I’m referring to. It also had a question on it about the semi-conservative model of DNA replication and using a different isomer of Nitrogen to test this.</p>

<p>I suppose my only worries at this point are free response, but if I had to hedge my best I’d say one will be on H-W or general genetics/evolution, the anatomy one will most certainly be structure vs. function, and there will be a lab one. I’m going to hit up Lab Bench over the weekend and go back over all of them. Just hoping it’s not going to be based on the DO lab. We literally did that one in twenty minutes. My teacher seems to think this years’ will be based on the Wisconsin Fast Plant lab and DNA recombination frequency.</p>

252

<p>humorme, i feel you. i have bio and physics too. )’: someone shoot me.</p>

253

<p>Please, let one of the FRQs include H-W. Those are so easy.</p>

<p>Can you guys explain to me the difference between Mendel’s laws of segregation and independent assortment? They seem like they are sort of the same thing. Is segregation just that gametes separate into different daughter cells? And independent assortment just means each pair of chromosomes separates into different daughter cells independent of the other pairs of chromosomes? Thanks.</p>

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<p>@StudiousMaximus
Law of Segregation basically means that alleles separate and recombine during a cross.
Law of independent assortment takes this a step further and says traits separate independent of each other; one trait does not affect the inheritance of a another trait</p>

255

<p>Remember Law of Independent Assortment can be contradicted if the problem calls for linked genes. Generally, if the recombination frequency (# of offspring different from parents divided by total number of offspring) is less than 50%, the genes are said to be linked and you can throw independent assortment out the window.</p>

256

<p>@Matugi Ahhh wait, my teacher also is predicting the lab essay to be on DNA recombination. That has to be some sort of sign, right? And I’m praying for a H-W FRQ, I can do those in my sleep.</p>

<p>@StudiousMaximus The way my teacher explained the difference between Mendel’s two laws was that the Law of Segregation refers to the separation of alleles for the SAME trait into different gametes, while the Law of Independent Assortment refers to the random, independent separation of alleles for DIFFERENT traits.</p>

257

<p>Now, can someone explain to me what specifically we should know regarding embryonic development? The order is mortula - blastula - gastrulation, right? And gastrulation forms the ectoderm, endoderm, and mesoderm. But outside of that I’m pretty confused. Like, what do each of the three germ layers form, what is up with cleavage, and what are the classifications for the different kinds of embryo (I think there are two)?</p>

<p>And do you guys think diversity will mostly be limited to anatomical differences and identifying the phyla based on that?</p>

258

<p>matugi, are you talking about the released practice exam that you got a 80/100 on?</p>

259

<p>If it is the one whose last five questions revolved around the PCR and the ability to taste bitterness, than yes. I don’t remember what year it was but I can remember seeing the FRQs on AP central</p>

<p>EDIT: Hmm, nevermind. It looks to be one released in the nineties.</p>

260

<p><a href=“http://www.raleighcharterhs.org/faculty/whames/APBiology/ap%20biology%20practice%20exam.pdf[/url]”>http://www.raleighcharterhs.org/faculty/whames/APBiology/ap%20biology%20practice%20exam.pdf&lt;/a&gt; is the one i’m talking about</p>

<p>i was going to say, if any human ap bio student got an 80/100 on that demonic practice exam then i’d like to die</p>