*** Official AP Biology Thread 2012-2013 ***

<p>I am pretty sure you can choose any reasonable numbers!!!</p>

<p>@the84thline oh ok i am not sure what you exactly what you mean. and i dont remember the one minute observed ithink it was asking the 10 min observed</p>

<p>lol that made no sense sorry</p>

<p>yeah i am not sure what you mean but you might be right</p>

<p>I said that the 1 minute data could be used to predict the 10 minute data. Obviously wrong, but so is null hypotheses in the case of linked genes.xD Anyhow, how are we all feeling about the lobe-finned fishes evolving to amphibians question?</p>

<p>For the null hypothesis FRQ, I used 50, 5, 5. Idk why tbh… I tried 60, 0, 0 but then realized that the 0s would cause it to be undefined and you cant have that…</p>

<p>Oh you need the rock that was 370 million years old</p>

<p>I put that you needed rocks near coasts or under shallow water.</p>

<p>Cuz that’s between 380 million and 363 million</p>

<p>FOR THE 2nd LONG QUESTIONS WHAT WAS GRAPH 1 and 2??? WHICH ONE WAS chlorophyll a and which was bacteriohoposis)???</p>

<p>Also would the endosymbiotic theory worked for part C of Long frq?
I thought test was easy but timing was hard.</p>

<p>…i did 390 million…i though i had a good explanation</p>

<p>@Whitesox137 haha yeah i got the exact same thing, 11.1. I chose to accept it because i forgot how to decide whether or not you accept/deny it…</p>

<p>Graph I was bacteriorhopsin, Graph II was chlorophyll a.</p>

<p>It thought the evolution question asked what type of rock IN GENERAL would be useful.</p>

<p>May have missed 1 or 2 here. ;(</p>

<p>oh yeah it said that the fossils had to be AT LEAST 380 million years old. so anything after that wouldnt have any evidence 370 million would haveno evidence of transition</p>

<p>1/16, 50/50 for each one (1/2 to the 4th power therefore)</p>

<p>lmao! why would you do 390…</p>

<p>does anyone remember any of the multiple choice? there was a question that had answer choices in the form of a question</p>

<p>Wait now I’m confused. How old was the rock supposed to be?</p>

<p>For C, I said that the evolution of the plants occurred from different wavelengths of light being accessible to plants in alternate environments. This caused a difference in fitness among plants with the “right” pigments for photosynthesis and the “wrong” pigments. Only the plants with the pigments that absorbed the predominant wavelengths was able to survive through. Graph I was bacteriorhopsin and Graph II was chlorophyll a.</p>