Biology SAT II POST-EXAM discussion!

<p>10- the question said caffeine inhibited the release of ADH (which stimulates water reabsorption by the kidneys). then it asked the result of this; the answer is a larger volume of dilute urine (choice B)</p>

<p>no, the question said that caffenine stops ADH secretion, which means it stops the saving of water, which means water is lost in the urine, which means the urine is diluted..</p>

<p>question asked for whta was the <em>primary</em> reason water moved thru trees, it's not cohesion, its high specific heat of water, b/c of transpiration pull</p>

<p>"inhibited the release of ADH." ADH-hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules.</p>

<p>Right, so if more water is reabsorbed, it would be more concentrated?</p>

<p>IronChef- it's cohesion; transpiration pull is also called the cohesion-tension theory: <a href="http://www.mun.ca/biology/singleton/Topic%2013/mTransportinPlants.htm%5B/url%5D"&gt;http://www.mun.ca/biology/singleton/Topic%2013/mTransportinPlants.htm&lt;/a&gt;&lt;/p>

<p>IvyLeagueORbust- ADH causes more water to be reabsorbed. since ADH is not released, less water is reabsorbed; this water is released with the urine, making it more dilute</p>

<p>no, ironchef i believe you are looking too much into that question, cohesion lets the water connect to itself so it is able to move up the tree trunk, specific heat of water is something you wouldn't even have to know for the biology sat ii (it wasn't in any book that stated the properties of water, but cohesion/adhesion was def. there)</p>

<p>ADH- Made the urine DILUTE </p>

<p>Primary blah blah ----> cohesion</p>

<ol>
<li>pcr was to create more of the dna (easy)</li>
<li>the farmer was jipped!</li>
</ol>

<p>Also, the one about the trees (pines, conifers, etc.) I said the only limiting factor was the nutrient content, since pines nor oaks had any affect when you compared the two charts.</p>

<p>what two hominids were most closely related? </p>

<p>And on that lab question on prebiotic earth with miller and urey's experiment, what was the area with most organic materials?</p>

<p>appearance of young red oaks (or was it white oaks) due to seeds brought by animals, and not mutation in the larger alternatively-colored oak population? </p>

<p>did the boy have hemophilia (or was it color blindness) because he got chroms from both parents, or because he inherited the X allele from his mother (the latter, right?)</p>

<p>what else....</p>

<p>65- meiosis in higher plants produces spores (I think)</p>

<p>the insects question at the end...i was going to omit it, but ended up picking the microwaves choice...tell me if my reasoning is correct. since the question asked how insects detect plants or flowers, whatever, wouldnt that mean that they use the radiation emitting the least energy (microwaves), to recognize leaves or flowers blowing in the wind? is that completely incorrect? in any case, i dont think it'd be u.v. cuz it also said that insects can see this type of radiation while humans can't. wouldnt uv rays be way too strong for insects to see?</p>

<p>oh and for how did the red oak get there question, i put a white oak mutation. what exactly was the seed choice?</p>

<p>ok so guys, can someone list the questions from my list that you guys feel are definitely wrong? Also, does anyone remember anymore stuff?</p>

<p>and also meiosis in hgihger plants produce spores?</p>

<p>for the red oak question, why couldn't two tree's engage in hybridization?</p>

<p>was hay the source of food for the lab quest in E?</p>

<p>Insects definitely see UV light: <a href="http://www1.umn.edu/umnnews/Feature_Stories/SciFri_2.11.05_Color_me_essential.html%5B/url%5D"&gt;http://www1.umn.edu/umnnews/Feature_Stories/SciFri_2.11.05_Color_me_essential.html&lt;/a&gt;&lt;/p>

<p>The red oaks got there because animals carried red oak seeds to the plot.</p>

<p>INSECTS ---> ultra violet (found it on the web); also, that's why people often purchase ultra violet lights to kill flies and others insects </p>

<p>...from a Bug Light's Light:</p>

<p>ITS SO BEAUTIFUL!!!! ZAPPP = Dead Fly</p>

<p>:)</p>

<p>yea i'm a bit unclear on the oak questions</p>

<p>66- cell cycle = 40 hrs</p>