June 2010: Biology

<p>as with the antennae question, some other answers on the compilation list are incorrect. for example, the target of the hormone in one of the graphs was the ovary, NOT the uterus. the uterus is where the egg implants itself; the hormones graphed were FSH and LH. FSH stimulates the follicle, which exists in the ovary. LH surges cause ovulation. the uterus is irrelevant ; )</p>

<p>@no_audio. Are u sure that FSH and LH were the hormones? cause i thought the hormone was estrogen and thats what the compiled list of answers said</p>

<p>@DitzyDino i think u might be wrong cuz butterfly have two pairs of antennae alsoo so im not realy sure.</p>

<p>did anyone think that they really did bad, but ended up getting like a 700+ on Bio-M ever before? im at the verge of that.</p>

<p>im only expecting like a solid 700, cuz its my first try, and I HOPE I REALLY DO GET IT! ik that some people say that this forum is too full of opinions that drive u nuts, cuz some ppl may be wrong with the answers, but idk, im still not canceling though.</p>

<p>@no-audio, do you know the curve for the may exam for bio-m? or do u know the curve for 3 omit for bio-m? plz tell me!</p>

<p>no_audio</p>

<p>were u sure that it was asking for 2 pairs of antennae?
and my teacher said she thinks its human selection just because humans are known to decrease variety in plants/crops due to monoculturization or sumthin, and that self pollination still results in some variation…like u can get diff’t types of roses even if u self pollinate…
and what other answers do u disagree with on the answer compliation?</p>

<p>@sevenkong is this rose problem part of the first 60 questions or part of the bio-E or part of the bio-M cause i dont remember that question.</p>

<p>@cellomaster
I think the E section</p>

<p>and this test was complete bull…SO many questions that ive never even seen in either barons or PR came up…***? how were we supposed to know crustaceans had 2 pairs of antennae as opposed to one pair unless we somehow looked it up on google…</p>

<p>I didn’t think the test was bad. And what question was the antanae one? was it part of bio-E?</p>

<p>no it was like in the beginning…what has a head and 2 pairs of anntenae? i put butterfly but im realizing now that its crayfish…I have like 4 wrong definately if thats true… ugh</p>

<p>And no_audio your wrong crayfish dont have heads they have cephalothoraxes</p>

<p>Wait are u sure the question asked for 2 paris of antennae. cause i just remember it said has antennae. However crayfish have gills though, so im pretty sure that leaves butterfly to mach with antennae</p>

<p>yep righto^</p>

<p>@cellomaster
I think we can choose an answer more than once though, because for the symbiosis question there was 2 mutualisms and 1 commensalism. plus nowhere did it mention that we can only choose one answer for each question. </p>

<p>@jun1orz
In crustaceans, they are biramous and present on the first two segments of the head, with the smaller pair known as antennules.
All other arthropod groups have a single, uniramous pair of antennae.
-Wikipedia
So no, butterflies only have one pair</p>

<p>@ditzydino what symbiosis question?</p>

<p>sevongkong, ceptothorax was clearly scorpion, so you’re wrong</p>

<p>yo guys is it too late to cancel my score??</p>

<p>@ cellomaster
the symbiosis question was those three questions about what kind of relationships 2 organisms are in
moss and tree - commensalism
anenome and clownfish - mutualism
3rd one (cant remember) - mutualism</p>

<p>@sevenkong</p>

<p>I understand your argument. However, it is incorrect to say that a crayfish does not have a head. In other words, “cephalothorax” is a term that is specific to the way the head and the thorax are sometimes arranged in crustaceans. (Hence, the question that asked for the organism with the cephalothorax was intended to test whether the student knew that the cephalothorax was specific to ONLY the crayfish in the list of animals.) </p>

<p>The question that asked for the antennae was not the College Board retesting whether we knew what a cephalothorax was. The antennae question explicitly said “two pairs” (I remember rereading the question 3 times). The only animal in the list with two pairs of antennae is the crayfish. Whether the question said “head” or not is irrelevant because crayfish DO have heads (they’re just part of the cephalothorax). Remember that having a head is an evolutionary development that began with Phylum Platyhelminthes. </p>

<p>If you need a source:</p>

<p>“The body of a crustacean is composed of body segments, which are grouped into three regions: the cephalon or head,[3] the thorax,[4] and the pleon or abdomen.[5] The head and thorax may be fused together to form a cephalothorax,[6] which may be covered by a single large carapace.”</p>

<p>–Wikipedia</p>

<p>@ Cellomaster</p>

<p>I also play the cello! Going to a lesson right now actually…
Anyway, I recall that the graph was of estrogen now. I put “ovary” as the answer, but it was probably “uterus.” Thanks for bringing that question up!</p>