<li>Eggs fertilized by two sperm instead of one sometimes form a mitotic spindle with three poles. After mitosis the daughter cells will probably</li>
</ol>
<p>A. be indisguishable from normal cells
B. eliminate the chromosomes contributed by the second sperm
C. elminate the chromosomes contributed by the egg
D. display an abnormal number of chromosomes
E. stop protein synthesis immediately</p>
<ul>
<li>the answer is D. can someone tell me what is the terminology when this happens (like a specific word - ex: oogenesis)?</li>
<li>An ecologically sound reason for conserving tropical rain forests is that they</li>
</ul>
<p>a. supply most of the oxygen that humans breathe
b. occupy 4/5 of earth’s surface
c. are the major producers of atmospheric nitrogen
d. are crucial to migratory ungulates
e. are an important reservoir of biodiversity </p>
<ul>
<li>i put a…but the answer is e. doesnt ecology include abiotic stuff as well?</li>
</ul>
<p>2) A Tropical rainforest is the MOST diverse biome...like ever. And you wanted to preserve that biodiversity. I guess it provides a lot of oxygen too...but not many humans actually live near rainforests so it wouldn't supply the most oxygen. I think, anyway.</p>
<ol>
<li> Option A is not correct. 60% the Oxygen is produced by phytoplankton in the ocean. Only a part of the remaining 40% is produced by the rain forests.</li>
</ol>
<p>that # 20 is a really unlikely of showing up. the answer seems clear, but yeah the backround info....is there even a term for it? unless you just call it a threesome at molecular level, i am clueless. as for 46. yeah the answer isn't exactly one-sided but tropical rainforests are most known for their vast bio diversity. and also, i bet since they have trees as well as many aerobic animals, most of the oxygen is consumed anyway and little is left for humans.</p>
<h1>20: I would think it would be called triploidy because there are three sets of genetic info. But not totally sure. And I agree with amar890 - HIGHLY doubt something as obscure as that would come up on the test. When I took it, I was actually kind of surprised at the generality of it (not to say that it's general...)</h1>
<p>It's not triploidy, that would imply there is 3 times the haploid amount of genetic information in each cell. Either way, it won't show up on the test.</p>