<p>For the protein questions I explained different structures for protein, like primary, secondary, and tertiary. For the flower one, I explained self-incompatibility and genetic diversity. How can they prevent self-pollination? Well, they would become overly dependent on insects, so they would develop prettier petals and more pleasing smells to attract. Also, some plants just develop male or female gametophyte (i.e. mango).</p>
<p>For the net productivity one, I basically explain the overall relationship displayed on the graph. The two variables form positive correlation; in other words, as one goes down, the other one goes down as well.</p>
<p>for the protein bonds:
1. ionic bonds between charged molecules of the R groups interact in the tertiary stage
2. hydrogen bonds between hydrogen and other molecules in the tertiary stage
3. disulfide bonds between sulfurs in the tertiary stage</p>
<p><em>i entirely forgot about peptide bonds -_- so mine were all from the tertiary stage</em> do you think they would count that?</p>
<p>i totally forgot about the peptide bond too. does that even count? it's just a covalent bond but with amino acids anyway. but i think that they had the hydrogen, ionic, and disulfide bond in mind when they ask about bonds that contribute to a proteins shape.</p>
<p>also, what did everyone put for the mechanisms to prevent self-pollination of flowering plants? did they intend for the mechanisms to be that of plants or of humans also? cuz i just put that you can cut off the anthers of plants with both pistils and anthers. and i said you can place a baggie over the stigmas lol. that ap exam was funny, didn't know anything.</p>
<p>Peptide bonds most definitely count. All you needed to mention were dehydration synthesis/hydrolysis, I think. I said ionic bonds connected R things to the compound...I couldn't think of the word groups. Sickle cell...it happens a lot in Africans...that's all I could think of. Didn't even think of malaria. ARGH...</p>
<p>I went general of self-pollination of flowers, and said prezygotic barriers. I kinda said maturing of pollen and eggs at different times, but not really. I then said the stamen would close if it recognized the pollen...WAY off.</p>
<p>self fertilization prevention -- mechanical barriers like only stamens or only carpels on flower and chemical -- the plant can reject its own pollen to block fertilization. this leads to more genetic variation -- talk about darwin lol.</p>
<p>for frq2, i talked about summer turnover because in spring, the winter ice melts and circulates the nutrients from the bottom of the pond/lake. i just said that during summer water is hotter and mixes with the cold water, thus circulating the nutrients and this cycle is similar to the given data. Therefore, the data should be relatively similar (if not higher due to longer hours of sunlight)</p>
<p>For preventing self polination the two obvious ones are.</p>
<p>1.The placement of the female and male gametophyte. If the male gametophyte is placed below the female there is less of a chance of self polination.</p>
<p>2.Also there are "female" and "male" plants or plants with only a male or a female gametophyte.</p>
<p>for self-fertilization prevention:
~made up something about stigma head part being too small with pollen grains to reach stigma/style part
~temporal isolation [male/female parts mature at different times]</p>
<p>(d) Describe how the relationship between net primary productivity and depth would be expected to differ
if new data were collected in mid-summer from the same pond. Explain your prediction.</p>
<p>@ cbrochill: LOL!!! it's ok. i just wrote some crap about spreading your seeds and growing at different heights or w/e crap... made sense when i was bsing hahaha.</p>
<p>this is probably no going to work, but do you guys think i would get at least partial credit for answering enzymes/metabolic rate? at least i mentioned the thermocline and spring turnover....</p>
<p>I put "I made all this up" in one of the answers to FRQ #3...and couldn't be specific on FRQ #1. But MC went well, and I'd be happy with a 4. If you asked me this question right after the test ended, I would have taken the nearest sharp object and skewered myself.</p>