**OFFICIAL SAT Biology E/M June 2013 Exam**

<p>@alyssa193 I put O2. don’t the rbc’s carry o2?</p>

<p>@satman @medicalboy
So was the answer to the beetle one an upward concave up graph starting at zero?</p>

<p>@satman:</p>

<p>since you probably got an 800, I’m going to ask you all my questions haha</p>

<p>What was the answer to the blood plasma question?</p>

<p>can anyone confirm what the beetle problem was asking? Was it about the population or about the individual organisms?</p>

<p>the beetle one had “number of organisms” on the y axis and “time” on the x axis, so I think population</p>

<p>oh ****! Was the plasma one about the buffer? Cause I put oxygen, but I think it’s bicarbonate</p>

<p>@satman1111 it was bicarbonate</p>

<p>The beetle curve one was the one where it started really high, then as time passed, drastically dropped. It was a deep curve.</p>

<p>oh yeha it was population</p>

<p>Pretty sure the uterus feedback was the answer. The endometrium sheds without fertilization</p>

<p>@satman1111:</p>

<p>noooo. Your mixing two different problems - one asked about the buffer (which was bicarbonate) while the other one asked ‘which of the following is not contained in blood plasma that is 90% water’</p>

<p>So… the answer should be saliva right??
[What’s</a> in Plasma?](<a href=“http://faculty.stcc.edu/AandP/AP/AP2pages/Units18to20/blood/whatsin.htm]What’s”>http://faculty.stcc.edu/AandP/AP/AP2pages/Units18to20/blood/whatsin.htm)</p>

<p>@megalomaniac the answer said that the endometrium sheds when the egg is not fertilized</p>

<p>and yes, that one was saliva. </p>

<p>And if the beetle one was the population, would it be the graph that goes up fast, then hits the carrying capacity?</p>

<p>What was the one about the two different types of plants that lived in the desert (sorry for not being specific)? I put adaptive radiation, but I’m 99% sure that’s wrong.</p>

<p>For the oocyte question, what caused the delay in the beginning?</p>

<p>Can anyone confirm te wording of the endometrium answer ? I thought it said that the endometrium sheds when fertilization occurs</p>

<p>the dessert plant one was convergent evolution. The one where there was a lot of types of very similar insects that all have different niches was the adaptive radiation</p>

<p>I remember the endometrium one, because I remember thinking it could have been the feedback between the uterus and ovary answer, but then I remembered the pituitary is involved as well</p>

<p>What about the choice for the female monthly thing? I don’t remember putting it but it could be a choice?</p>

<p>That answer said that menstruation occurs every month FOR THE WHOLE LIFE, but it only occurs until menopause</p>

<p>The endometrium answer is straightforward and true. I think its the answer…</p>