IGCSE/GCSE/O & A Level/IB/University Student Forum
Qualification => Subject Doubts => IGCSE/ GCSE => Sciences => Topic started by: igstudentegp on June 06, 2009, 12:35:35 pm
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Was the answer "fats" or "Water" in biology paper 1 ?
Also the question of the arrows was tricky ..
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i think it was fats cuz fats cnnot be found in plants!
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Green plants can make all the materials(including fats and sucrose)using water,carbon dioxide and salts. They r synthesized from sugar molecules and other molecules produced in photosynthesis.
Glucose and amino acids are transported in solution(water). Fats are synthesized for cell membrane and for storing in seeds.
SO THEY LACK FATS
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for sum reason.. I chose water... cuz a phloem tube transports amino acids and sucrose, and the aphid only fed on phloem tubes.... and why would a Aphid even need fats?
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The question was what do aphids LACK in their diet. Thats fats, because the phloem doesnt transport fats.
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yeah.. thats true ....
but didnt it lack both ...?
Im sure I got myn wrong anywayz ...
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What was the answer for the arrows question in which they asked about the energy flows?
was it D or whichever one that was from decomposers to plants?
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yeah.. thats true ....
but didnt it lack both ...?
Im sure I got myn wrong anywayz ...
sugars and amino acids are transported in solution- in water ;)
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well i think it was fat !!
but how about the last question about the fish \ oxygen \ bacteria thing?? ???
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i did water...i don't think they lack fats they don't really need it.....so i think it is water.
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the aphids question definitely lacked FATS.. cuz the question asks: which type of food did the aphids lack and water isnt a type of food but fats are.
for the water arrow question, the answer was the one at the stomata bec water never enter the plant thru stomata, instead it only enters thru the roots.
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well i think it was fat !!
but how about the last question about the fish \ oxygen \ bacteria thing??
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the answer for the last question about eutrophication was D.
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anyway.. wat did u guys put for the heart question.. was it W and X that contract at the same time??
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wat was x nd wat was w??
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X was the right atrium and W was the left atrium.. so if u chose W and X, u would be sayin the 2 artria contract together
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what about the question on which exp. had the most % of oxygen was it the lungs, or the free unchanged jar?
:-[
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I did the right ventricle & left atrium :-\
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loool... I Did the same ... :-X
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loool... I Did the same ... :-X
LOL...so is it correct?!
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loool... I Did the same ... :-X
LOL...so is it correct?!
nope sorry
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AH MAN! lol, thats the 3rd mistake
so what was the answer?
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there's something called an atrial and ventricular systole. Both the atria contract together and both ventricles contract together. So it's A
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Oh my damn! I wrote A & when i reviewed my paper, i changed it!!
Why!! >:(
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I chose sucrose, because, I think that they meant what does it lack in diet, as in it will eat what it lacks....so since it feeds on phloem tube, and the phloem translocates sucrose, thats what it must lack, as it feeds on it and needs it.... ???
I hope im right :-\
For the heart diagram, I chose X and Z (left atrium and rigt ventricle)
For the arrow question, I chose B (stomata)
For some unknown reason, for the chloride paper question, I chose Plant Y, upper surface (on the chart, the highest bar<<<I thought tht the one tht takes the most time to turn pink loses water rapidly, as absense of water would not turn the chloride paper pink :-\
Hmmmm.... :-\
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& what was the answer for the energy flow diagram?
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I put fats...still not sure if it was right tho...wouldnt it be both of them?
How did you people find it (the whole paper1)? I thought it was quite hard! :(
Can anyone explane the fats/water question to me? Thankyou. ???
What was the kidney one...I put arteries and veins, was that right?
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i wrote water for that ;) ;) ;)
and arteries and veins is right!! ;D ;D ;D
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well i think it was fat !!
but how about the last question about the fish \ oxygen \ bacteria thing?? ???
i think it was D
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I put fats...still not sure if it was right tho...wouldnt it be both of them?
How did you people find it (the whole paper1)? I thought it was quite hard! :(
Can anyone explane the fats/water question to me? Thankyou. ???
What was the kidney one...I put arteries and veins, was that right?
ya, arteries and veins is right...
I wrote sucrose(Aphids will eat what they need <so since phloem translocates sucrose, thats what Aphids must lack, therefore they feed on that>) :-\ Im not sure if Im right
and ya, it was a tricky paper....I hope the thresholds are not 37/40 for an A :-\
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well i think it was fat !!
but how about the last question about the fish \ oxygen \ bacteria thing?? ???
i think it was D
Ya, it was D
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i wrote water for that ;) ;) ;)
and arteries and veins is right!! ;D ;D ;D
AH alhamdulallah
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it was fats cuz they sed which FOOD...
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and of course there is water in the phoem
I mean to dissolve the amino acids and the sucrose ::)
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No
Its A for the heart beating
Cause there is something about Atrial Systole that u have to know
Atrial systole is the contraction of the heart muscle (myocardia) of the left and right atria. Normally, both atria contract at the same time.
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FAT IS NOT A FOOD
answer is water
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guyz for the cobalt chloride one, was it the one with the highest or lowest bar ?
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guyz for the cobalt chloride one, was it the one with the highest or lowest bar ?
it was the lowest bar
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yaaay ...!!
first I did the highest bar.. and then literally 2 seconds be4 she sed.. put ur pens down I changed it
wooho..!
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guyz for the cobalt chloride one, was it the one with the highest or lowest bar ?
it was the lowest bar
I think is the highest bar (bec the plant that took the most time to turn the paper pink meant that that water was lost rapidly, so absence of water did not turn the paper pink)
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
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yaaay ...!!
first I did the highest bar.. and then literally 2 seconds be4 she sed.. put ur pens down I changed it
wooho..!
Exactly! because it was plotted against time
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i wrote water for that ;) ;) ;)
and arteries and veins is right!! ;D ;D ;D
AH alhamdulallah
the answer should be ONLY Arteries bcoz...
for a health person..of course glucose need to be absorbed by the kidney...
8)
Glucose is taken back, or reabsord, into the blood....
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um u guyz even tho phloem transports amino acids and sucrose they CANNOT be travelling in " solid form" u cant hav amino acids travelling in a line along the tube they HAVE TO travel IN SOLUTION so they definitely get water.....fats are wat lack nowhere in a plant are ther fats, so answer has to be fats..even my bio teacher sed so
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FAT IS NOT A FOOD
answer is water
neither is water!! fat is closer..lol
nehow...everyone cirlced fats..
and for the hear diagram...it was W and X...cuz they both contract and push the blood downwards to the lower to chambers to recieve while they r relaxin...thn they contract while the atriums relax and the blood is forced through the arteries...
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
didn't the question ask for the plant surface that loses the water most rapidly?
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
didn't the question ask for the plant surface that loses the water most rapidly?
Yer, thats what I thought - so it must be the smalest bar?
Because if it lost a lot if water the paper would turn pink quickest...right?? :-\
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Right 8)
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Guyz... there are 6 parties going on in the PAAARTTTYYY thread in Chit chat....
its starts at 10 00 ... and every1s invited ... !!
just make sure you bring ur +repps :P
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students say that paper 1 was easy, a piece of cake and else, and still are arguing badly on many questions!!!!!!
its strange!
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
didn't the question ask for the plant surface that loses the water most rapidly?
Yer, thats what I thought - so it must be the smalest bar?
Because if it lost a lot if water the paper would turn pink quickest...right?? :-\
Ya, but loss of water=absence of water
presence of water turns the chloride paper pink, which means the absence of water should not turn it pink, therefore the one tht took the most time lost water most rapidly...
:-[ :-\
Hmmm.... :'(
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Yup
which was the highest bar
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does anyone hav 98 bio p1 cuz my frnd said the question is there,if so can u check the mark scheme? ;)
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Really ?
I have the mark scheme but not the past paper
can u tell me what question no. is it ?
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so it waz da highest bar ryt???and wat was the oxygen--->X--->oxygen-->Y
CO2<----X<----CO2<--Y i got X body cells and Y lungs... :-\...is tht ryt??
and the energy flow ...wat waz NOT one of da part of energy flow...i got btwn plants and decomposers....
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Really ?
I have the mark scheme but not the past paper
can u tell me what question no. is it ?
no dunno ill try to get it though then post back
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OH COOL!!!!!THIS IS MY 100TH POST!!!! ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
didn't the question ask for the plant surface that loses the water most rapidly?
Yer, thats what I thought - so it must be the smalest bar?
Because if it lost a lot if water the paper would turn pink quickest...right?? :-\
Ya, but loss of water=absence of water
presence of water turns the chloride paper pink, which means the absence of water should not turn it pink, therefore the one tht took the most time lost water most rapidly...
:-[ :-\
Hmmm.... :'(
your lost ;), its actually the smallest bar 8)
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
didn't the question ask for the plant surface that loses the water most rapidly?
Yer, thats what I thought - so it must be the smalest bar?
Because if it lost a lot if water the paper would turn pink quickest...right?? :-\
Ya, but loss of water=absence of water
presence of water turns the chloride paper pink, which means the absence of water should not turn it pink, therefore the one tht took the most time lost water most rapidly...
:-[ :-\
Hmmm.... :'(
no that is wrong presence of water turns the paper pink and as the leaf looses water by transpiration the faster the water lost the lesser the time taken because the water would escape through the styoma in the form of vapours which will be absorbed by the paper so it will turn pink therefore the lowest bar is the answer.its their in the mckean txtbk
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What was the answer for the energy flow diagram?
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
didn't the question ask for the plant surface that loses the water most rapidly?
Yer, thats what I thought - so it must be the smalest bar?
Because if it lost a lot if water the paper would turn pink quickest...right?? :-\
Ya, but loss of water=absence of water
presence of water turns the chloride paper pink, which means the absence of water should not turn it pink, therefore the one tht took the most time lost water most rapidly...
:-[ :-\
Hmmm.... :'(
no that is wrong presence of water turns the paper pink and as the leaf looses water by transpiration the faster the water lost the lesser the time taken because the water would escape through the styoma in the form of vapours which will be absorbed by the paper so it will turn pink therefore the lowest bar is the answer.its their in the mckean txtbk
kim ans my questions plz!!!
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You eat food right?
The food also contains water even if it is in a little amount right?
So why do you drink water?
So i think its water they lack in their diet.
Besides the aphids wouldnt want to become obese.
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You eat food right?
The food also contains water even if it is in a little amount right?
So why do you drink water?
So i think its water they lack in their diet.
Besides the aphids wouldnt want to become obese.
EXACTLY!!
hahaha OBESE!! nice one :P
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The aphids lack FAT!!!! Its common sense. When you break a plant in half, watery stuff comes out meaning that the plant transports WATER!!
The surface of the leaf that loses water the fastest is the one with the LOWEST BAR!! The lowest bar means it took the least time to turn the paper pink, which means it gave out water the fastest.
The heart one is the 2 atrioles, or W and X, or answer A.
The monocot leaf is D, the long thin one.
The energy flow diagram is D, the one that goes from the decomposer to the plant.
The last question.... I have no idea. I put B :P. BUT ONLY ONE WRONG SO FAR WOOHOO!!
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loool...!
you sound like you're gonna write the mark scheme ...:P
hehe.... or maybe you sound like an examiner ...:P
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so u guys still didnt answer 1 question...was it fats or water??
and the ccobalt chloride one was plant X lower surface rite!? and the heat one...was it sweating and vasoconstriction?!
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so u guys still didnt answer 1 question...was it fats or water??
and the ccobalt chloride one was plant X lower surface rite!? and the heat one...was it sweating and vasoconstriction?!
It was fats
The answer was plant X lower surface I think. Whichever had the lowest bar.
It was sweating and vasoDILATION!!!
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no mate... u read the question rong... it was suposed 2 be the one tht lost the LEAST water ...
didn't the question ask for the plant surface that loses the water most rapidly?
Yer, thats what I thought - so it must be the smalest bar?
Because if it lost a lot if water the paper would turn pink quickest...right?? :-\
Ya, but loss of water=absence of water
presence of water turns the chloride paper pink, which means the absence of water should not turn it pink, therefore the one tht took the most time lost water most rapidly...
:-[ :-\
Hmmm.... :'(
no that is wrong presence of water turns the paper pink and as the leaf looses water by transpiration the faster the water lost the lesser the time taken because the water would escape through the styoma in the form of vapours which will be absorbed by the paper so it will turn pink therefore the lowest bar is the answer.its their in the mckean txtbk
kim ans my questions plz!!!
annie i already told u that the i wrote fats but i m not sure!
and we will c who talks to who!!!!!!!!!!!!!!!!!!!!!!!!wait till i talk to u!!!!!!haha
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wow... all my ans are correct over here.... looks like im gettin full ova here inshallah ;D
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it's fats, i asked my teacher about it, wow, i got 40/40
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i get 39/40
wohoo still good!!!!!!!!!!! :D ;D
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u guys r still asking about this Q :D :D :D
its fats.....thats it.
and i got 40/40 (expected) :P :D :D
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What about the homo sapien Q, which was it?
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binomial system....
Genus species
the first one capital, second one small
Homo sapien
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Wa was tha ans for which part of a healthy persons body will contain glucose?
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artery and vein
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binomial system....
Genus species
the first one capital, second one small
Homo sapien
Oh man, lost tht mark...Thanks nywayz
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sry to let u down MM :) ;)
sure u will get A* inshallah :)
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artery and vein
me and my freinds were having a huge fight over this answer and i got it right!!!!
i can rub it in their faces tomorrow!hehe lol
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artery and vein
me and my freinds were having a huge fight over this answer and i got it right!!!!
i can rub it in their faces tomorrow!hehe lol
yes u can.....do it proudly! :D
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artery and vein
me and my freinds were having a huge fight over this answer and i got it right!!!!
i can rub it in their faces tomorrow!hehe lol
yes u can.....do it proudly! :D
haha u bet i will!!!!!!!!!!!!!!!!
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Guyz wt abt the 4 cells which were placed in conc. salt solutions ??
It was A right ?? ( the one which was plasmolysed )
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Guyz wt abt the 4 cells which were placed in conc. salt solutions ??
It was A right ?? ( the one which was plasmolysed )
Yea the 1 that shrunk
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r u sure man ?
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r u sure man ?
100% sure, its the one with the cell membrane away frm the cell wall...so A
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Ok look guys think about it, what is sucrose?
Its a carbohydrate
What happens to sucrose when its is changed by enzymes
It becomes an individual glucose molecule
What happens when an organism (An Aphid in this case) has an excess of carbohydrates
They are stored as Fats
And so if the aphid is eating the phloem it will rightly obtain sucrose
Which can than be stored if in excess as fats
Thus meaning that fats cannot be the answer
Allowing us to conclude through elimination of the obvious first two and now Fats
That water is to be lacking.
Am i right... Think about it ;D
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Ok look guys think about it, what is sucrose?
Its a carbohydrate
What happens to sucrose when its is changed by enzymes
It becomes an individual glucose molecule
What happens when an organism (An Aphid in this case) has an excess of carbohydrates
They are stored as Fats
And so if the aphid is eating the phloem it will rightly obtain sucrose
Which can than be stored if in excess as fats
Thus meaning that fats cannot be the answer
Allowing us to conclude through elimination of the obvious first two and now Fats
That water is to be lacking.
Am i right... Think about it ;D
Nice Explanation but dont think so
glucose can be changed into glycogen and stored :P
And what if it didnt feed on excess of carbs?!!!
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its definitely water.. :)
isnt fat immobile..?
wat wud it be doing in the phloem?
it shud be water i guess...
wat say guys..? ???
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i actually dnt care abt d explaination as we r nt getting marks on it
my only concern is tht ma ans shld be correct n tht is water.......
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water cannot be lacking cuz all substances in phloem are transported in a solution. Plz don't repeat the mistake again in ur paper 2morrow.
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Ok look guys think about it, what is sucrose?
Its a carbohydrate
What happens to sucrose when its is changed by enzymes
It becomes an individual glucose molecule
What happens when an organism (An Aphid in this case) has an excess of carbohydrates
They are stored as Fats
And so if the aphid is eating the phloem it will rightly obtain sucrose
Which can than be stored if in excess as fats
Thus meaning that fats cannot be the answer
Allowing us to conclude through elimination of the obvious first two and now Fats
That water is to be lacking.
Am i right... Think about it ;D
Nice Explanation but dont think so
glucose can be changed into glycogen and stored :P
And what if it didnt feed on excess of carbs?!!!
Yeah true but the question clearly states that the contents of the phloem are all that the aphids eat
So therefore we know that it is eating usually excessive amounts of carbs thus justifying what i said.
Yeah but glucose is only changed into glycogen as a means of homeostasis, thats a completely different answer or even question
And plus isn't it the xylem's job to carry water and minerals.
Sucrose can be used as a transporting agent for amino acids.
Think about it Haven't you ever felt a sticky substance when you cut open a leaf, if you haven't try it.
So what i am trying to say is fats are just basically carbs stores assuming as said before that aphids are only eating the contents of the phloem as the question states. :)
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Ppl listen:
the aphid feeds on the phloem's contents, that means it obtains sucrose and amino acid. Done!
it cudn't POSSIBLY be lacking water in its diet cuz it would die (of dehydration or whatever). Done!
so obviously the answer is fats.
I know we r all trying to justify what we wrote, cuz obviously we dont want to know our thinking was wrong ! :P
p.s. i chose amino acids not fats By the way
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I was really c0nfused between fats nd water..b3d kda 3mlt "7ady bady" XD
nd i ch0se fats thanx g0d!! XD
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the correct answer is water not fats..................i asked a doctor...........sorry guyz
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R u sure..WATER?! :O
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the correct answer is water not fats..................i asked a doctor...........sorry guyz
its over...and its fats forever......hehe..beside......we alrdy finished
lets just not make it affect our vacation....FORGET BOUT IT!
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well...I chose water too...n my explaination is same as OpAsi ;D
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the correct answer is water not fats..................i asked a doctor...........sorry guyz
then you should a) Tell 'your' doctor the question b) change your doctor :o
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LOOOOOOOOOLLLLL.........!!!
Welll whoooooppppieee for mee....!!! ;D ;D ;D :D :D :D
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the correct answer is water not fats..................i asked a doctor...........sorry guyz
w8 kind of doctor?? Plant doctor?? haha...lol
it's fats. whether u want to to believe it or not.
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haha plant doctor, loool :P
Yeah guys its fat FULLSTOP, dont worry i put water because i didnt read the word FOODS haha :P
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haha plant doctor, loool :P
Yeah guys its fat FULLSTOP, dont worry i put water because i didnt read the word FOODS haha :P
guys y don't u guys get it. food is not necessarily solid.. water is liquid food because it has some value in our diet.
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haha plant doctor, loool :P
Yeah guys its fat FULLSTOP, dont worry i put water because i didnt read the word FOODS haha :P
guys y don't u guys get it. food is not necessarily solid.. water is liquid food because it has some value in our diet.
haha ok
Then the answer was fat beacause water is used as a solvent for amino acids and sucrose and not because it is not foods??
:P
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haha plant doctor, loool :P
Yeah guys its fat FULLSTOP, dont worry i put water because i didnt read the word FOODS haha :P
guys y don't u guys get it. food is not necessarily solid.. water is liquid food because it has some value in our diet.
haha ok
Then the answer was fat beacause water is used as a solvent for amino acids and sucrose and not because it is not foods??
:P
i know that dear :P but ur reason above seemed illogical "i put water because i didnt read the word FOODS haha :P" so i wanted to make u understand...just clear it u see
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haha plant doctor, loool :P
Yeah guys its fat FULLSTOP, dont worry i put water because i didnt read the word FOODS haha :P
guys y don't u guys get it. food is not necessarily solid.. water is liquid food because it has some value in our diet.
haha ok
Then the answer was fat beacause water is used as a solvent for amino acids and sucrose and not because it is not foods??
:P
i know that dear :P but ur reason above seemed illogical "i put water because i didnt read the word FOODS haha :P" so i wanted to make u understand...just clear it u see
haha i know, so i am asking if u this is correct haha! :P
Yeah haha it did :P
LOOL
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the correct answer is water not fats..................i asked a doctor...........sorry guyz
w8 kind of doctor?? Plant doctor?? haha...lol
it's fats. whether u want to to believe it or not.
LMAO! plant doctor mwhahahaha
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hehe.. lol anyways it was fats .. duh ..
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fats thats what i choose
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OMG ITS FATS CANT U PPL GET THAT IN YOUR HEAD???? WHY WOULD ANY ORGANISM NOT DRINK WATER???? IT WOULDNT HAVE BLOOD!!
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MY TEACHER TOLD ME IT IS FATS
CHEEEEEEER UP THOSE WHO CHOSE IT
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No one said it didn't drink ANY water, were just saying that it was LACKING water
So therefore it would still have blood.... don't freak out ::)
What were saying is that water is not transported in the phloem
Only in the XYLEM (And please don't bring up that solution stuff again)
Sucrose can be turned into fats if it is in excess which in basically is
As the APHIDS are feeding on it constantly :)
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ofcourse guys it's fats
although phloem doesnt transport water alone but how could sucrose and amino acids ever be transported in phloem if they're not found as a solution? as powder??? as crystalline solids???? ofcourse not
and remeber that an importance of water is that it is a transport medium so everything is transported in it.. no matter what the phloem transports , water has to be in there. ;)
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wow lol, 8 pages and u guys still going :P
its only 1 mark lol, and fat appears to be the winner =P
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obviously fat is the winner. Some ppl are adamant on water being the answer.
And By the way, phloem does transport water. Check your textbook people.
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u guys enough wid this! one mcq, dusnt matter! i think its the first time a topic is 8 pages cuz of ONE MCQ
lol :)
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FOR THE LAST TIME PEOPLE THE ANSWER WAS FATS I ASKED MY TEACHER SO STOP DISCUSSING IT !!!!!!!!!
LETS DO ANOTHER QUESTION INSTEAD!!!!!!!!!!!!!HAHA ::)
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I won't be surprised to find myself opening SF and seeing 100 pages for this thread...it might even go on after the results are out
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I won't be surprised to find myself opening SF and seeing 100 pages for this thread...it might even go on after the results are out
HAHA THAT WOULD BE HILARIOUS!!!!!!!
IMAGINE ON THE DAY THE MARKING SCHEME CUMS OUT WE ALL BWILL BE LUKIN AT IT TO C IF IT WAS FATS OR WATER!LOL :P
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for sum reason.. I chose water... cuz a phloem tube transports amino acids and sucrose, and the aphid only fed on phloem tubes.... and why would a Aphid even need fats?
GOOD POINT
.....\m/.....
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I won't be surprised to find myself opening SF and seeing 100 pages for this thread...it might even go on after the results are out
HAHA THAT WOULD BE HILARIOUS!!!!!!!
IMAGINE ON THE DAY THE MARKING SCHEME CUMS OUT WE ALL BWILL BE LUKIN AT IT TO C IF IT WAS FATS OR WATER!LOL :P
some may even doubt the markscheme and start another debate...lol..some guys on the forum are so adamant.
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I won't be surprised to find myself opening SF and seeing 100 pages for this thread...it might even go on after the results are out
HAHA THAT WOULD BE HILARIOUS!!!!!!!
IMAGINE ON THE DAY THE MARKING SCHEME CUMS OUT WE ALL BWILL BE LUKIN AT IT TO C IF IT WAS FATS OR WATER!LOL :P
some may even doubt the markscheme and start another debate...lol..some guys on the forum are so adamant.
instead of fighting those peolpe shouls have thought about wat to write b4 their is no point in expressing your point because no examiner checks this paper it is don't by a OCR so no one is going too think that oh he must have meant that..
so give it up ppl its is just 1 mark!!!!!!!!!!(no offense)
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I won't be surprised to find myself opening SF and seeing 100 pages for this thread...it might even go on after the results are out
lol srsly!!!!!
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guys we need to finish this topic, only it counts of 1 mark!!!!!!!
Chill out!!!!!!!!!!
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it was water because the phloem transports HORMONES as well and hormones are made up of FATS (written in the study guide) so fats is wrong and WATER is correct
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it was water because the phloem transports HORMONES as well and hormones are made up of FATS (written in the study guide) so fats is wrong and WATER is correct
um sorry but u r wrong cause the answer is fats i asked my teacher and she said it is fats because the food is dissolved in water and then transported in the phloem so the aphids get water!so it is fats :P
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"ADAMANT". nid is using my vocabulary. Im proud of her. ;D