<p>thorps- i got it out of the ap biology sparknotes powerpack. </p>
<p>shrubber- i just looked in my campbell biology book and there are two definitions for the word, both yours and mine. i forgot to include both, sorry.</p>
<p>Hey, does anyone know about a chat room for bio? I would like to start one myself, but don't know how...</p>
<p>we should do that after the ap test but for now i think its good to review here so that everyone can read it.</p>
<p>question:
In meiosis, genetic differences come from what 2 things?</p>
<p>Good idea.</p>
<p>Crossing over and random assortment?</p>
<p>The site of lipid synthesis in the cell is ________________.</p>
<p>I believe that genetic differences come from crossing over, where pieces of chromosomes break off and attach themselves to their homologous pair. Differences also come from the random assortment of which chromosomes go to which ends when they separate in anaphase. I hope I am right and could be of some help!</p>
<p>I heard rumor that the questions Barron's study guide are harder than the actual exam. True or false? I hope so becuase I didn't do so well on one of their practice exams.</p>
<p>I also heard that Barron's was harder than the actual AP.</p>
<p>Holy crap.. no wonder i got a 4 on that thing cuz i took an actual ap test and got a 5.. and took a barrons test and got a frikkin 4.. i was like oh crap..</p>
<p>its weird, we learn all this specific stuff in class, like the stuff in this thread, and then when i took the practice from 2003,or whatever year, i missed just 20 MC questions, most were not very specific. Then, on the essays, they give you credit for all the basic things that a middle schooler would know, but nothing for the really detailed stuff. I got 10/10 on all of them, but just barely because i kept going too in depth, instead of saying the obvious. </p>
<p>the essay grading is so weird...</p>
<p>lipid synthesis occurs in the endoplasmic reticulum!</p>
<p>What's the difference between protostome and deuterostome?</p>
<p>i don't remember exactly but...
protosome- becomes mouth during fetal development
deuterostome- becomes anus during fetal development</p>
<p>theres like spiral and circular development too, but i dont remember which is which. that would be great if somebody could clear that up.</p>
<p>How are C4 and CAM photosynthesis different from C3?</p>
<p>C4- instead of the CO2 being fixed by rubisco into pga, and it combines with PEP to form OAA. the purpose is to move CO2 from mesophyll cells tp the bundle sheath cells.</p>
<p>CAM- OAA is converted to malic acid, and rather than being moved out of the cell to the bundle sheath cells it moves to the vacuole of the cell, the stomata open at night and are closed during the day (does this also happen for the C4 plant?)</p>
<p>discuss each of the following as they relate to speciation: geographic barriers, adaptive radiation, polyploidy, and sexual selection.</p>
<p>
lipid synthesis occurs in the smooth endoplasmic reticulum!</p>
<p>geographic barriers-cause allopatric speciation where one species splits into two specoies because of a physical barrier (sympatric is without a physical barrier like due to behavioral differences)</p>
<p>adaptive radiaton- Not sure about this one...I'm thinking Galapagos island and Darwin one species arrived on the island and diverged into different species because of beak shapes (?!) and access to different kinds of food.</p>
<p>polypoidity is an abnormal number of chromosomes, either too much or too little exapmle: Down syndrome.. fatal in humans most of the time, but popular in plant species</p>
<p>sexual selection- animals selecting mates because of certain traits.. example is a manes in lions</p>
<p>I did all of this off the top of my head, so please correct if I'm wrong!!</p>
<p>how good is PR's Bio...if i only use that to study from?</p>
<p>differentiate between:
tranformation, translation, transcription, transduction, transpiration, and transposon</p>
<p>we already had that question....</p>
<p>describe southern blotting, gel electrophoresis, and restriction enzymes.</p>