<p>Why does everyone take Biology SAT? At my school like 20 people are taking SATII Bio, but only like 5 are taking SAT chem.</p>
<p>was random gene disappearance over time in a population mutation/gene flow/genetic drift?</p>
<p>The primary cause of ‘acid rain,’ more accurately called acid deposition, is air pollution from burning fossil fuels. Fossil fuel use does not directly emit acids into the atmosphere. Instead, it releases large amounts of acid precursors, primarily sulfur oxides (SOx) and nitrogen oxides (NOx). When exposed to the atmosphere, these react with water to form sulfuric acid and nitric acid, components of acid deposition.</p>
<p>Aerosol is accepted as Ozone issues.</p>
<p>Also Successful body type</p>
<p>An infant marsupial is known as a joey. Marsupials have an extremely short gestation period (about 4–5 weeks), and the joey is ‘born’ essentially in a fetal state. The blind, furless, miniature newborn, the size of a jelly bean, crawls across its mother’s fur to make its way into the pouch, where it latches onto a teat for food. It will not re-emerge for several months, during which time it develops fully. After this period, the joey begins to spend increasing lengths of time out of the pouch, feeding and learning survival skills. However, it returns to the pouch to sleep, and if danger threatens it will seek refuge in its mother’s pouch for safety.
Marsupials are not born fully developed.
The answer was long gestation period and fully developed offspring at birth.</p>
<p>Yeah they should definitely removed that questions
“Sulfates occur as microscopic particles (aerosols) resulting from fossil fuel and biomass combustion. They increase the acidity of the atmosphere and form acid rain.”
There is two answers!</p>
<p>So you can get about 2 wrong and still get an 800?</p>
<p>for the acid rain question, both are right. this is a horrible question.</p>
<p>and for the different cells, i put protein synthesis from rna at diff locations</p>
<p>i think the darwin one was that each organisms have slight variations that drastically increase fitness or something along those lines, but im not very good at that sort of stuff. as for the differentiation of cells, i think i put proteins</p>
<p>thanks annoyingaakash12</p>
<p>what do you think the curve is?</p>
<p>-7/8 so far…</p>
<p>whenever there was a question regarding determining phylogenetic relationships, the answer was always to study DNA nucleotide sequences right?</p>
<p>^ I agree</p>
<p>10 char</p>
<p>Someone said -1 or -2 yields a 800 
I would say -3 'cause some questions are so tricky.
-13 or 15 would give a 700 i think</p>
<p>For the one with the diagram and the two organisms on the shore, I put embryology because I thought all DNA sequence are the same. They’re different because different parts of the gene are turned on/off but the sequence is still the same.
I’m not sure though. My brain kinda did a somersault on that one.</p>
<p>what about the coloration of the butterflies or whatever?
i put like intraspecific diurnal visual or something like that</p>
<p>^ yeah I put that</p>
<p>What were the substrates for that chemical equation thing?
Was it CO2 + H2O?</p>
<p>Don’t you think there will be a better curve? What is a-10?</p>
<p>aakash your right.
and for Darwin it was “slight variations that drastically increase fitness”. It might have been that. I remember it said something about extinction kills off weaker organisms. Not really. So maybe. Either way, I’m pretty sure it was slight variation.</p>
<p>yes i think so^</p>
<p>@facepalm: I think people have agreed on the substrate concentration one. It is a hard one tho :"(
@annoyingaakash 12: diurnal for sure.</p>
<p>i put the slight variation answer as well</p>