<p>The amount of oxygen dissolved in water is so insignificant compared by the oxygen produced by the plant.</p>
<p>Here’s a question I know everyone did.</p>
<p>Which was “a new trait that arises in an isolated population”? Mutation?</p>
<p>Yeah mutation. </p>
<p>For the rocky one, I put it absorbs the moisture on one side, and the other side is kinda barren. This is from the Planet Earth Video </p>
<p>WAS IT A PINE TREE? oh no!</p>
<p>Pine trees prefer sandy or rocky soil</p>
<p>“What shows change in viruses such as HIV or Ebola” </p>
<p>And IT WAS PINE TREES. SO IT WAS ROCKY. :(</p>
<p>I thought the new trait was genetic drift because of the founder effect.</p>
<p>My AP Bio teacher talked about a population that has polydactyly; thus a new trait arises in an isolated population (genetic drift).</p>
<p>Additionally, a mutation can happen to any population, not just an isolated one.
Thus, I refuse to believe that mutation is correct.</p>
<p>Does anyone want to get a summary going?</p>
<p>@141421356, I think it was a pine tree! yessss! my guessing skeelz, fer once, did not fail me :D</p>
<p>Now pine trees may prefer that soil, but would cb really expect you to know that? That’s my problem with accepting that answer. That, and because I picked choice E about the precipitation too quick for pines to use it and I want an 800. :(</p>
<p>Anyone want to respond to my genetic drift assertion?</p>
<p>Actually the founder effect refers to a small group splitting off a large group and colonizing a new place. The example of this ur talking about are the amish people. Although the trait for polydactly is rare, it was magnified by the small population of amish people who immigrated to America. Thus, i put mutation.</p>
<p>@djumper168, yeah, but we’re expected to know biomes - coniferous plants grow in taigas. A pine is a coniferous plant. Taiga’s don’t have nice soil…= pine trees not needing great soil. Therefore Pine trees like rocky soil… .___. Yeah, that was a stretch…lol</p>
<p>I would say genetic drift, but I think the word isolated is very important. I’m trying to review some bio books to find a definite answer.</p>
<p>Well genetic drift is basically a change in the allele frequencies of a population due to chance. Genetic drift is more common in small populations because a mutation in one individual can significantly alter the frequencies - personally I find understanding genetic drift to be intuitive, as the more individuals in the population, the less a mutation will be reflected in the “picture as a whole”, so to speak.</p>
<p>If you’re asking about the specific questions themselves, the question that asked for a change in the gene pool or something like that was most likely mutation while the question that talked about small populations was genetic drift.</p>
<hr>
<p>Also, what did you guys get for the first three answers? I got tropical rain forest, deciduous forest, and tundra, respectively. Please tell me I didn’t misread deciduous when it actually said coniferous?</p>
<p>yes syndekit. the fact that the population was isolated and that it “randomly” appeared insinuates that nothing called for the change. Polydactyly, if i remember correctly, is the Amish population? that was an example of genetic drift and it was in an isolated population, but its appearance was not random. Its appearance was due to the founder effect</p>
<p>@DuneCoriolis why would you put mutation?
The trait arose because the population was “isolated.”</p>
<p>@scuba Yes, the Amish exhibit the founder effect, but this effect is one of the two types of genetic drift, the other being bottleneck. Nevertheless, it’s irrelevant as the question did not mention the word random or chance. It said “new trait in an isolated population”. And I just looked in Barron’s to find the definition of a mutation as “introduction of a new allele into a population”.</p>
<p>EDIT: @dune lol! We both looked at Barron’s in the same exact minute! xD</p>
<p>Well genetic drift didn’t make sense. Gene flow didn’t make sense. I picked mutation cus it was a small and isolated population and because thats sort of the definition of it from the barron’s book i studied.</p>
<p>The question did not not say “random.”
It said “a new trait that arises in an isolated population.”
I missed the other genetic drift question, but definitely not this one.
Additionally, I missed the green pigment question.
So, that’s 2.</p>