<p>What was that one about the reaction of X=Y (goes both ways)? Was it activation energy = zero, or the rate at which X was formed = the rate at which Y was formed?</p>
<p>For the essay question about how a virus goes against the dogma, could you use the temperate virus that undergoes a lysogenic cycle or lytic cycle (can't remember the name) where it lies dormant in a cell's DNA and keeps getting produced, or were they looking for reverse transcriptase?</p>
<p>i hope for the viruses one retrovirus or lytic cycle would be acceptable. i put viruses that need a host cell to reproduce because viruses cannot go directly from DNA to protein, so that goes against the central dogma.</p>
<p>what’s the advantage to using other ways to determine phylogeny? (i.e. homology or embryonic development?)</p>
<p>I dunno I put retrovirus. That was the most obvious.</p>
<p>I put skeletal structures and embryonic development. Homologous/analogous skeletal structures can show specific functions and how animals are related. Embryonic development can show details that are present early on but lost in later life such as protostome/deuterostome. Sorta bs’d it.</p>
<p>What frq are you talking about with the X Y reaction stuff? Why don’t I remember that? </p>
<p>Also, for the phylogeny one, I said you can look at their genomes and compare the similarities. Like how the chimpanzee is 98% the same as humans. I said an advantage would be that its very precise. But I felt like I totally bs’d that.</p>
<p>Augh. When it said specific i thought it meant to actually give a specific virus so i chose HIV AIDS. i did talk about how it was a retrovirus though. And i included a diagram of an virus. Do you think i’ll get extra points for that?</p>
<p>jzhang I used homologous vs analogous too. </p>
<p>I drew a cladogram too! High five!
Or negative five, for doing it wrong, I guess.</p>
<p>For the phylogeny one I talked about DNA sequencing (98% the same coding sequences, etc) and about morphology in terms of homologous/vestigial structures. Kinda BS’d it too.</p>
<p>I put fossils too. I also did comparative embryology or something. I had no idea how to draw the phylogenic tree. Oh I and I also had an epic fail on the graph. I made a bar graph, lolz.</p>
<p>I think it was supposed to be like a curve type thing (cyclic shaped). I literally stared at the data for five minutes wondering how to proceed. The lack of grid threw me off.</p>