June 2009 - Biology

<p>uh oh… thats 2 wrong so far…</p>

<p>What did you guys put for the cladogram one? like the one with thatt tree branching off with the different phylum? Where was the duestrome/prostome division. </p>

<p>This was for ecology btw.</p>

<p>angiosperm/gymnosperm: seed</p>

<p>angiosperms and gymnosperms = seeds</p>

<p>^^^They both experience internal fertilization NOT external.</p>

<p>I put inorganic because I was primarily thinking of phosphorus fertilizers as an example. And phosphorus is an inorganic compound right?</p>

<p>Oh geez, you’re right. I can’t believe I didn’t recall all those videos of insects humping I saw in bio class.</p>

<p>angiosperms and gymnosperms both have seeds. the difference is between them being covered.</p>

<p>it is definitely exoskeleton. insects/crustaceans do not have external fertilization - that’s only frogs and such (amphibians)? or one or the other.</p>

<p>

So you agree that as PTH decreases Calcium level increases?</p>

<p>

To answer the second part of your question that because unlike humans plant shave the ability to produce vitamins themselves unlike humans which must take them in. That’s why some humans have to to take vitamin pills extracted from plants since they can produce it themselves.</p>

<p>As to answer the PTH question this was the first on in the set of PTH questions right? If so I remember putting B, not exactly sure what it was though sorry.</p>

<p>Ugh, I don’t know anymore! xD</p>

<p>oh, the first two questions for ecology i had no idea. Do you remember putting ‘B’ for the first question? I left the protostrome one blank.</p>

<p>^ yeah i believe i put B for the first one</p>

<p>and what about the plant lab one. With the plant seeds growing in the dark? obviously that wasn’t photoperiodism (light). I thought it was either touch or gravity.</p>

<p>Any molecular bio people on here? </p>

<p>I had trouble with the one question with three graphs and how the third graph with the RNA inhibitor would affect the production of the RNA. I narrowed it down to either all production would stop or the levels of RNA would not increase. </p>

<p>Any ideas?</p>

<p>PHEW.
Next - Tapeworms?!!!
Refer to a previous post: What is true? I. (rapid? reproduction/and or by eggs?) II. toxins III. NO digestive system</p>

<p>I put II only.</p>

<p>were the ones growing in the dark around the stake? the second plant? that’s touch.</p>

<p>

</p>

<p>Was anything touching the seeds? Yeah, no. It was obviously a gravitropism (a positive one, at that). The one growing around the stake was a thigmotropism.</p>

<p>^^ I put I. and II.</p>

<p>@ Keasbey Nights: good. Thats what i put.</p>

<p>@motivated, the answer was gravity because the plants were at the edge of the petri and they were growing downwards. the other answer choices like pH, temp, didn’t make sense.</p>

<p>Okay first to address the plant lab… And unfortunately the second one was touch or thigmatropism. Why couldn’t the first one be light.</p>

<p>And ahhh! PTH questions are killing me.</p>

<p>

I put would not increase. I don’t recall there being an answer choice that said all production would stop.</p>

<p>sscrono: i said all production would stop, the answer was something like “neither TAT mRNA nor TAT would be produced”</p>

<p>wait, the first plant was gravitotropism?
darn, i thought it said it was in light, the edge was dark, so the plants were growing inwards (lol didn’t think of the soil…gah!)</p>

<p>was commenalism used</p>