<p>actually a lot of people think its easy. i read campbells also, but i didnt memorize the whole book. so im reviewing. if you dont need to review, then just dont.</p>
<p>Yeah I think polyploidy is a form of sympatric speciation. I think it is when two gametes that have a nondusjuntion mutation join to form a zygote. So the zygote has 4n chromosomes.</p>
<p>Also for Gyros question
Excretory mechanisms
Annelida - nephridia and metanephridia in each segment
Arthropoda - Malphagian tubules</p>
<p>Potential,
The exam may be hard for one person and easy for another. For example, my friend took it last year and said the MC was easy but the essays were hard because they never wrote essays in class. Another friend took that same exam, skipped like 20-30 questions on MC, but aced the essays and ended up getting a 4.</p>
<p>Andreaa & Others:</p>
<p>The test has 120 MC questions, which make up 60% of the exam.
The test has 4 Essay questions, which make up 40% of the exam. </p>
<p>Would the grading system change from what you had it as Andrea? How would it be graded? Also, what would you need to get a 5, 4, 3, 2, 1?</p>
<p>120?...my teacher said CB changed it to 100 MC....</p>
<p>Did they really? When did they change it? I only said 120 because it said that in Cliffs AP.</p>
<p>Never mind, you're right. It's 100 questions.</p>
<p>Yah I was reading Cliffs too...</p>
<p>Do they still multiply .75 to the MC score though?....</p>
<p>AIM chatroom: apbio07</p>
<p>For all your AP Biology reviewing needs.</p>
<p>Question: How much do we need to know about parts of the brain etc.? I.e sensory/associative function</p>
<p>im pretty sure general knowlege is sufficient, but just in case i suggest going over in detail anyways (if you have time). Taking the US History AP exam made me realize the AP Bio will most likely be easier than expected as well.</p>
<p>Anybody think chi squares will be on it?</p>
<p>That's one of the things my teacher thinks. They might very well give you the formulae and expect you to simply apply the info.</p>
<p>saw a past frq on chi squares - as redknight said, formula given, just apply it</p>
<p>Off to reviewing the brain</p>
<p>can anybody give a quick review of chi squares?</p>
<p>hey....how many points minimum does it take to get a 5? just wondering...thanks!</p>
<p>Good point, grayday.</p>
<p>chi squares - take the observed values, subtract it from the expected (depending on sample size and expected ratio), square that value, then divide it by the expected.</p>
<p>add up all the values and check it on a .05 probability (most of the time) chi-square table. if the # in the table is greater than the # you got, then you can accept the null hypothesis, which states that there is no statistically significant difference between the observed and expected.</p>
<p>also, you need degrees of freedom for the table, which is gotten through taking the # of phenotypes(categories) and subtracting it by 1.</p>
<p>Tunit, it's somewhere around 90-95 out of 150ish possible.</p>