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Since there isn't one already, I'll just make it. How did you all think of the test?

By Eecs (Eecs) on Saturday, May 01, 2004 - 12:54 pm: Edit

What's the answer for "which of the following is true of the female reproductive system?" the answers i were debating about was "the egg is fertilized in the fallopian tube" and the other one had something to do with ovulation and menstrual cycle occuring at the same time.. i think..

By Traci87 (Traci87) on Saturday, May 01, 2004 - 01:06 pm: Edit

"the egg is fertilized in the fallopian tube" is the right one

what did you get for the 3hrs at zero degrees

was is after three hours all the enzyme was used up?

By Eecs (Eecs) on Saturday, May 01, 2004 - 01:21 pm: Edit

for that one, i think i put "lower temperature makes metabolic rate slower". is that one of the answer choices?

By Sydney22 (Sydney22) on Saturday, May 01, 2004 - 01:30 pm: Edit

did you do molecular or ecology?? i did ecology

By Eecs (Eecs) on Saturday, May 01, 2004 - 01:39 pm: Edit

molecular for me

By Sydney22 (Sydney22) on Saturday, May 01, 2004 - 01:59 pm: Edit

how many can you miss to get a 800/700/600

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 02:13 pm: Edit

molecular...

i thought it was pretty easy overall...

what was the answer to the 3rd group of questions?? the one about passive/active immunity? i said mother's milk = passive, chicken pox = active... is that right?

By Paradox (Paradox) on Saturday, May 01, 2004 - 02:17 pm: Edit

Firebird: yes, that's right.

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 02:24 pm: Edit

the "ear" question baffled me:

how does the ear tell between pitches?

i was debating b/w choice A: "diff parts of basi3u84 (i dunno) membrane vibrate" and choice E: "thrumyicn {sp?} membrane picks the pitch to send auditory signals"

i chose A

By Paradox (Paradox) on Saturday, May 01, 2004 - 02:31 pm: Edit

Quoth the Campbell bio book: "Pitch can be distinguished by the cochlea because the basilar membrane is not uniform along its length.... Each region of the basilar membrane is most affected by a particular vibration frequency."

How clever of me not to have read that chapter yet.

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 02:33 pm: Edit

heh, same here...

wow currently i'm 3 for 3 on [educated] guesses

By Eecs (Eecs) on Saturday, May 01, 2004 - 02:36 pm: Edit

yay i picked the basilar membrane one.. what's the one that made you choose between XX, XY, and XO for the female? it said "typical," so i was thinking only XX... is that right? cuz XO is "possible" but is it "typical"?

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 02:45 pm: Edit

the exact wording was like: which of the following is typical of a human female?

so yea, it was ONLY XX, XO ppl have Turner's syndrome, occurs 1/5000 births

By Traci87 (Traci87) on Saturday, May 01, 2004 - 04:59 pm: Edit

i posted a thread earlier this week
and they said 5-6, none omitted =800

By Aim78 (Aim78) on Saturday, May 01, 2004 - 05:08 pm: Edit

Damn, so far 4 wrong, 1 omit. I think I got the rest though, or at least most of it. I had active immunity for the chicken pox and passive for the mother, and then I switched them because I figured the antibodies in the milk were ACTIVELY protecting the fetus, and the immunity to chicken pox was only PASSIVELY protecting. But I had no idea what the terms actually mean, I was just reasoning it out. Just checked on the net, I was wrong. :-(

By Traci87 (Traci87) on Saturday, May 01, 2004 - 05:10 pm: Edit

what was the muscle releasing one? was it ATP or ADP? were there two answers as active immunity? chicken pox and b antibody w/b cell?

By Aim78 (Aim78) on Saturday, May 01, 2004 - 05:36 pm: Edit

I put ATP. ATP binds to the myosin head and becomes ADP and Pi, and when the cross bridges cause the release of ADP and Pi you get the sliding movement.

By Eecs (Eecs) on Saturday, May 01, 2004 - 05:47 pm: Edit

ATP for the actin/myosin.

chicken pox - active immunity
mother passing on immunity to baby - passive immunity
b cells clumping - agglutination

for the one that asked you how new alleles arise, did anybody get "mutation"? the other answer choices were like crossing over, independent assortment of gametes.. something like that.

and did anybody get "convergent evolution" for the one with the wings of a bat and insect having similarities? or is that "homology"? i put homology at first but then i changed it to convergent evolution...

hopefully the missing 5-6, none omitted = 800 is true...

By Paradox (Paradox) on Saturday, May 01, 2004 - 05:59 pm: Edit

Entirely new alleles are the result of mutations; crossing over and everything else just swaps existing ones. Convergent evolution is that which leads to similarity between analogous (not homologous) structures -- those with common purpose but without a common origin. So my answers were "mutation" and "convergent evolution".

By Sydney22 (Sydney22) on Saturday, May 01, 2004 - 06:08 pm: Edit

for the one that had pictures of different organisms, and it asked you to chose the one that had 2 skin layers and 1 opening i chose the starfish, was that right??

By Chipwich87 (Chipwich87) on Saturday, May 01, 2004 - 06:14 pm: Edit

sydney, i put down the the picture of the hydra and jelly fish for that questeion.

im so angry at myself. i got the EASIEST question wrong.. i wanted to smack myself right after i left the school cuz i just wasnt thinking.. it was the one with heterotroph hypothesis ... i put that lichens were to first to develop.. ughhhhhhh

okay, this is an ecology question, the ? with the carrots... why did the carrot on the counterop sprout and no the one in the fridge? i was debating b/n a (countertop has higher metabolic rate )and c (countertop has slower respiration.)

and another one, 4th question, which organisms have cytosol contained by plasma membrane????

By Sydney22 (Sydney22) on Saturday, May 01, 2004 - 06:17 pm: Edit

what was the first ? bacteria?

By Eecs (Eecs) on Saturday, May 01, 2004 - 06:27 pm: Edit

umm, i'm pretty sure chipwich is right on the hydra and jelly fish... that's what i put anyway.

for the first i put bacteria, i think that's right... i forgot what a lichen was so i didn't even think about that one...

and the question with the carrots in the refrigerator and coutertop was in the core section right? anyway i put that the countertop has higher metabolic rate... not sure on that one

By Nyu2010 (Nyu2010) on Saturday, May 01, 2004 - 06:51 pm: Edit

Wait, for the hydra and jellyfish...were they III and IV?


And for the cytosol in the plasma membrane...I put that it was the prokaryotes but now I'm thinking that plants have the cytosol...

500, here I come! Should I cancel my score and just use this as a practice?

By Paradox (Paradox) on Saturday, May 01, 2004 - 07:07 pm: Edit

The hydra and the jellyfish, which were my answers, were II and IV, I think. (I was an earthworm and III was a starfish.) For the other question, cytosol is contained within the plasma membrane in all cells. Plants do have a cell wall, but that is only in addition to, and outside of, the plasma membrane. The plasma membrane is what allows cells to be selective about what goes in and out -- there's no substitute for it.

By Nyu2010 (Nyu2010) on Saturday, May 01, 2004 - 07:18 pm: Edit

Okay.


Oh, and on the one about the female having a color-blind son...50 percent, right? Because the son would have had to have her X chromosome...since it was sex-linked and recessive that X chromosome had a 50 percent change right? AHH help please. I hate genetics.

By Aim78 (Aim78) on Saturday, May 01, 2004 - 07:38 pm: Edit

Nice, I'm getting these. I said the carrot in the fridge had a lower metabolic rate. None of the others made sense - both carrots were in black bags so light had nothing to do with it.

For the carrots becoming more flexible, did you put that water evaporation caused the plasma membrane to pull away from the cell wall?

By Aim78 (Aim78) on Saturday, May 01, 2004 - 07:42 pm: Edit

Wait a minute, the egg is fertilized in the fallopian tube? I thought it was fertilized in the uterus, and it attaches to the endometrium because HGC sustains the corpus luteum. Am I wrong about this? I think my answer had something to do with ovulation and the menstrual cycle.

Ack, never mind, I checked it out. Cliffs never mentioned that.

By Eecs (Eecs) on Saturday, May 01, 2004 - 08:08 pm: Edit

yeah, i put that the plasma membrane pulled away from the cell wall.

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 08:26 pm: Edit

wait, wait, how is the picture thing II and IV?

i put that at first but then i thought jellyfish had no body cavities...i put II only

i'd by down to -1 if i got that wrong, :-)

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 08:33 pm: Edit

ugh, yea, looked it up, II and IV are definitely correct...dang

By Aim78 (Aim78) on Saturday, May 01, 2004 - 08:34 pm: Edit

Only Cnidaria has 2 germ layers and 1 gut opening, so that would be the hydra and the jellyfish.

By Dalaboy (Dalaboy) on Saturday, May 01, 2004 - 08:48 pm: Edit

Hey anybody remember the one question on ecology section where it asked for what is the characterstic or what isn't the characteristic of a trophic rain forest?
was it an except question?
my memory on that question is eluding me

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 08:56 pm: Edit

i took molecular, but i saw this question, it was like, which is NOT characteristic? the answer was "wild temperature fluctuations" i'm POSITIVE thats the answer. other choices were, poor soil, poor light, tall trees, and one other

By Sydney22 (Sydney22) on Saturday, May 01, 2004 - 08:56 pm: Edit

i think it was that there was nutrient poor soil.

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 09:04 pm: Edit

i dont think so, the Amazon, for example, has a topsoil that's like .0000000000001 nanometers thick...very poor nutrients, the only reason trees grow is when old trees and stuff die whose nutrients get used up hella rapidly...

if u think about it, rain forests are always a constant temp. since they are located in the tropics and the humidity keeps the temp. somewhat constant

By Traci87 (Traci87) on Saturday, May 01, 2004 - 09:15 pm: Edit

the .9 m scar on a tree from the ground question...was the answer .9? because trees have apical meristems? i have no idea what im talking about. haha

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 09:24 pm: Edit

thats the answer i put down, cuz none of the other choices made ANY sense...

By Mitodnaman (Mitodnaman) on Saturday, May 01, 2004 - 09:25 pm: Edit

I put .9, but I am not at a sure...it seemed that was the only answer that made sense, at least to me...Any help?

By Sarasote (Sarasote) on Saturday, May 01, 2004 - 10:08 pm: Edit

the scar doesnt stay in the same place....as the tree grows the scar doesnt magically move back down towards the ground. this is why the beginning they asked the question "what kind of math have you taken" this was a simple question where you used ratios. if at first the scar was .9 from the ground 6 meters/.9 = 36 meters/x meaning 6 meters was the original height, 36 is the new heigh so x would be the new distance. the answer was 6 meters

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 10:15 pm: Edit

uh, i think that's wrong:

6/.9 = 36/5.4

5.4 would have been the answer if we tried to solve it your way, it was the 1st thing i thought of, and no, that wasnt one of the choices.

By Sarasote (Sarasote) on Saturday, May 01, 2004 - 10:18 pm: Edit

yes but then again it was asking for an approximation. .9 is close enough to 1 and trees dont grow at the exact rate.

By Firebird12637 (Firebird12637) on Saturday, May 01, 2004 - 10:27 pm: Edit

u may be right...but 5.4 is awfully far away from 6

By Sarasote (Sarasote) on Saturday, May 01, 2004 - 10:32 pm: Edit

i think it mite be more of rounding .9 to 1 because since you cant have a calculator in the biology section it is easier to divide 6 by 1 than .9

By Reject (Reject) on Saturday, May 01, 2004 - 10:33 pm: Edit

Sarasote, are u sure? i thought trees have apical meristem? i'm pretty sure i've seen something like this before and the scar stays in the same spot.

By Aim78 (Aim78) on Saturday, May 01, 2004 - 10:38 pm: Edit

I put 0.9 as well. I started out doing the proportion, then I remembered that primary growth only occurs at the apical meristems (tips of roots and shoots). So I'm pretty sure it's 0.9.

Was there anything tricky about the data at the end of the molecular section? I answered those questions in a second and didn't look back to check them, and now I'm kind of nervous that I made a stupid mistake. It seemed very straightforward.

By Sarasote (Sarasote) on Saturday, May 01, 2004 - 10:38 pm: Edit

well i dun remember how the apical meristem affects the scars so i did the mathematical way and it worked out unless thats just another one of the ETS fooly things haha. but how would the apical meristem cause the scars to stay in the same spot

By Portlander (Portlander) on Saturday, May 01, 2004 - 10:39 pm: Edit

I said 0.9...if that makes any difference to anyone.

By Reject (Reject) on Saturday, May 01, 2004 - 10:40 pm: Edit

the tree only grows from the top of it with apical meristimatic cell division; it doesnt grow from the ground.

By Aim78 (Aim78) on Saturday, May 01, 2004 - 10:43 pm: Edit

Yeah, because growth only occurs at the cells on the top of the tree, so it's like piling up cells onto already existing cells. The pile will get big, but the part that we're looking at will stay in the same place relative to the ground.

By Portlander (Portlander) on Saturday, May 01, 2004 - 11:47 pm: Edit

awesome, awesome...

I have a question...
On the Molecular part of the test, it asks for the uses of vitamins...or something like that. The choices I believe were coenzyme, antibodies, etc...

I said antibodies....does anyone else agree?

By Kewlkiwi102 (Kewlkiwi102) on Sunday, May 02, 2004 - 12:14 am: Edit

use of vitamins is coenzymes i beleive,
and for the tree one it would be 0.9 m. imagine old carvings on trees, like initials and things. they stay at eye level/ wherever they were carved.
good luck all!

By Jude (Jude) on Sunday, May 02, 2004 - 12:38 am: Edit

edited

By Firebird12637 (Firebird12637) on Sunday, May 02, 2004 - 12:52 am: Edit

yes, definitely coenzymes...

By Julz711 (Julz711) on Sunday, May 02, 2004 - 01:18 am: Edit

I think that the tree question is 0.9 (I got something similar wrong on a test, and I think that was the answer). It makes sense when you think about it: when people carve their initials into a tree, they stay in the same spot, right? (I hate plant bio).

Above people asked about the question with the plasma membrane and cytosol. I'm pretty sure that it was all cells. I think cytosol was just generally referring to stuff in the cell, and all cells have a membrane.

I also found the molecular section a lot easier than I thought it would be.

By Aim78 (Aim78) on Sunday, May 02, 2004 - 01:49 am: Edit

Yep, it's in all cells. All cells including plant cells and prokaryotes have a plasma membrane, and the cytosol is just the liquid stuff inside. Vitamins are coenzymes...what else...I cannot remember a thing.

By Sydney22 (Sydney22) on Sunday, May 02, 2004 - 01:09 pm: Edit

for the one where there was a bag of ... sucrose or starch i think it was. was correct graph a flat line?

By Eecs (Eecs) on Sunday, May 02, 2004 - 02:10 pm: Edit

yeah i got a flat line for that one, because the dialysis bag was impermeable to starch, so no starch can come out.

By Drflet (Drflet) on Sunday, May 02, 2004 - 02:48 pm: Edit

But it was permeable to water, so as water entered the bag, the starch concentration would decrease. Thus, it would cruve down intially and then flatten out I believe.

By Drflet (Drflet) on Sunday, May 02, 2004 - 02:49 pm: Edit

In the second part on the first page, how many generations was it to obtain a 9:3:3:1 ration? 2? And also, what was the correct number of chromatin for the fruit fly egg in the same section?

By Mitodnaman (Mitodnaman) on Sunday, May 02, 2004 - 03:03 pm: Edit

ya, it was 2 to get 9:3:3:1

By Sydney22 (Sydney22) on Sunday, May 02, 2004 - 03:44 pm: Edit

yea but even if water were to enter the bag, the starch wouldnt leave. the starch content would remain the same

By Greenleaf144 (Greenleaf144) on Sunday, May 02, 2004 - 03:48 pm: Edit

for all of you who took the test...

Which one is the easier type of SAT II Bio? Ecology or molecular?

By Drflet (Drflet) on Sunday, May 02, 2004 - 03:56 pm: Edit

Yes, but it would be dilluted, bringing the concentration down.

By Firebird12637 (Firebird12637) on Sunday, May 02, 2004 - 04:07 pm: Edit

if water enters the bag, sugar concentration goes down, the question asked CONCENTRATION, not total mass

the answer to the chromatids was 16 (4 chromosomes, each has 2 sister chromatids, then tetrads, so like 4*4 = 16)

By Firebird12637 (Firebird12637) on Sunday, May 02, 2004 - 04:09 pm: Edit

ecology is easier overall, more intuitive.

but for me, i saw a question on E that i didnt know the answer to, so i chose M yesterday instead, worked out well cuz i think i got all of M questions.

By Aim78 (Aim78) on Sunday, May 02, 2004 - 05:56 pm: Edit

The graph would go down (because water is entering and concentration is going down), then flatten out (once it reaches equilibrium and nothing passes).

By Eecs (Eecs) on Sunday, May 02, 2004 - 06:17 pm: Edit

ahh, yeah the graph would go down and even out... i was thinking about the AMOUNT and not CONCENTRATION.. oh well.. hopefully that will be the only thing i missed.

and i got 16 for the one with the fruit fly chromatids. none of the other answer choices made sense so i picked 16. forgot about those tetrads!

and there was this one question, where they asked what must be true for all multicellular animals or something like that... was the answer "the gametes are always haploid"??

for the person that asked whether molecular or ecology was easier, it's whichever one that you feel most comfortable with because everyone's different. some classes will focus on ecology more, some molecular, and some are evenly distributed. just pick the one where you know more about

By Traci87 (Traci87) on Sunday, May 02, 2004 - 06:42 pm: Edit

what were your responses to the black paper bag, clear plastic, black plastic, etc bag experiment questions?

By Aim78 (Aim78) on Sunday, May 02, 2004 - 07:07 pm: Edit

My class didn't cover ecology, but I skimmed through it in the Cliffs the night before. Was the eagle the tertiary consumer?

By Firebird12637 (Firebird12637) on Sunday, May 02, 2004 - 08:53 pm: Edit

eecs - yes, the answer was "the gametes are always haploid"

aim78 - yes, eagle was the tertiary consumer

By Parabolic_Line (Parabolic_Line) on Monday, May 03, 2004 - 02:27 pm: Edit

Why would the graph go down? There really can't be an equilibrium between the two, and I'm assuming the dialysis bag was already filled to capacity with starch/water so that there wouldn't be a net movement of water.

BTW, whats the curve on this? How many can you get wrong and still get 800?

As for which is easier, E or M, it really depends on which your teacher gives the emphasis on. Personally I find M to be much more easier than E simply because I'm not that familiar with the E vocabulary. How many of you are taking AP Bio?

By Eecs (Eecs) on Monday, May 03, 2004 - 04:05 pm: Edit

the graph would go down because the inside of the dialysis bag is hypertonic, and thus there will be a net movement of water into the bag by osmosis. equilibrium is reached when the water concentration on both sides are equal. thus, the movement of water causes the concentration of solute to be diluted.

ummm, i don't know what the curve is like, but it's supposedly like -5 for an 800, according to somebody that posted above. and btw, i'm taking ap bio, and it's gonna kill me...

By Nexusgeo (Nexusgeo) on Monday, May 03, 2004 - 06:38 pm: Edit

Hey guys what did y'all get on that set of questions.. It was a lab set and had a diagram of dendrites and synapsis stuff. (MOLECULAR) The questions asked something about what effect would destruction of certain dendrites have and the order at impulses are delivered once particular segments were touched or something..

Any ideas? thanks

By Parabolic_Line (Parabolic_Line) on Monday, May 03, 2004 - 07:14 pm: Edit

For that one, you just had to trace the path the impulse would take and see how a destruction of a certain neuron would affect the entire process.