Author Topic: IGCSE Biology Paper 3  (Read 24030 times)

Offline thukon

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Re: IGCSE Biology Paper 3
« Reply #30 on: June 09, 2009, 05:48:41 am »
Liver cells - Nucleus, Cytoplasm, and cell membrane. I hope.
Yeah, hepatic portal vein and ileum
dry mass, i put measure the amount of solution uptaken by the plants., and then subtract from original. I think its wrong.

yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
But the same radish has to be used for 6 weeks. How would you "bake" it without killing it? Thats what the experiment says nid. They measure the growth of the plant for 6 weeks. They wont use different plants.

Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #31 on: June 09, 2009, 05:49:04 am »
DRY MASS IS THE DRY MASS OF AN ORGANISM!!!!YES THE ORGANISM IS KILLED because ITS ALL DRIED UP!!!!
Dont tell God how BIG your storm is...;tell your storm how BIG your GOD is.^_^

Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #32 on: June 09, 2009, 05:49:57 am »
bake it after 6 weeks...
Dont tell God how BIG your storm is...;tell your storm how BIG your GOD is.^_^

Offline thukon

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Re: IGCSE Biology Paper 3
« Reply #33 on: June 09, 2009, 05:51:48 am »
They measure the dry mass every week.  :D Im getting more and more confident that my answer has a SMALL chance of being correct.

Offline shagurl

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Re: IGCSE Biology Paper 3
« Reply #34 on: June 09, 2009, 05:53:15 am »
over all ws it easy, hard? how do u think the threshold will be?
i thoght it was very long, one thing. it was very "geo" like, u noe sooo many lines for each questions wid like 5 marks and all, weird, haha.
bt it was ok for me i gess
agreed the question were lengthy i finished at the last second.
but i liked it because it was easy, because all wat u had to do is put in info

Offline aquarian93

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Re: IGCSE Biology Paper 3
« Reply #35 on: June 09, 2009, 05:54:25 am »
I totally messed up with the Natural selection question[5mks]
But the paper was little bit hard compared to 2008.
Threshold will be 50/80 for A
hw do u noe abt the threshold? thats quite comforting

guys how did u find the paper!??

Offline QuickSilver

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Re: IGCSE Biology Paper 3
« Reply #36 on: June 09, 2009, 05:55:38 am »
I totally messed up with the Natural selection question[5mks]
But the paper was little bit hard compared to 2008.
Threshold will be 50/80 for A
hw do u noe abt the threshold? thats quite comforting

guys how did u find the paper!??
if this threshold is wrong then it's lower haha because i have never seen something above that for a paper 3 ;) soo RELAX ;)

The Paper was Ok, kinda lengthy with some trickies but i managed  :)

and i think everyone did :)


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Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #37 on: June 09, 2009, 05:57:04 am »
They measure the dry mass every week.  :D Im getting more and more confident that my answer has a SMALL chance of being correct.
the marks were 3 for this question....i m sure ull atleast get 1....luk on da bright side...evn 1 mark counts :)
Dont tell God how BIG your storm is...;tell your storm how BIG your GOD is.^_^

Offline thukon

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Re: IGCSE Biology Paper 3
« Reply #38 on: June 09, 2009, 05:57:20 am »
The natural selection answer was because the sickle cell hetero ppl cant get malaria right? So the survive due to survival of fittest, and they pass the trait onto their children right?

nid404

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Re: IGCSE Biology Paper 3
« Reply #39 on: June 09, 2009, 05:58:59 am »
Liver cells - Nucleus, Cytoplasm, and cell membrane. I hope.
Yeah, hepatic portal vein and ileum
dry mass, i put measure the amount of solution uptaken by the plants., and then subtract from original. I think its wrong.

yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
But the same radish has to be used for 6 weeks. How would you "bake" it without killing it? Thats what the experiment says nid. They measure the growth of the plant for 6 weeks. They wont use different plants.

they use different plants...im sure..just asked my sir

Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #40 on: June 09, 2009, 05:59:59 am »
The natural selection answer was because the sickle cell hetero ppl cant get malaria right? So the survive due to survival of fittest, and they pass the trait onto their children right?
i got this one rong..i actually got pissed off and i rote a story tht i dnt evn remember!! :D
Dont tell God how BIG your storm is...;tell your storm how BIG your GOD is.^_^

Offline Mirzaa

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Re: IGCSE Biology Paper 3
« Reply #41 on: June 09, 2009, 06:07:04 am »
Liver cells - Nucleus, Cytoplasm, and cell membrane. I hope.
Yeah, hepatic portal vein and ileum
dry mass, i put measure the amount of solution uptaken by the plants., and then subtract from original. I think its wrong.

yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
But the same radish has to be used for 6 weeks. How would you "bake" it without killing it? Thats what the
experiment says nid. They measure the growth of the plant for 6 weeks. They wont use different plants.

it says in the Hodder Murray revision guide, By the way, so it s gotta be rite. theres no 2 ways about it, to find the dry mass uve gotta bake the organism, even if cells denature etc etc

Offline Friends

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Re: IGCSE Biology Paper 3
« Reply #42 on: June 09, 2009, 06:13:07 am »
Liver cells - Nucleus, Cytoplasm, and cell membrane. I hope.
Yeah, hepatic portal vein and ileum
dry mass, i put measure the amount of solution uptaken by the plants., and then subtract from original. I think its wrong.

yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
But the same radish has to be used for 6 weeks. How would you "bake" it without killing it? Thats what the
experiment says nid. They measure the growth of the plant for 6 weeks. They wont use different plants.

it says in the Hodder Murray revision guide, By the way, so it s gotta be rite. theres no 2 ways about it, to find the dry mass uve gotta bake the organism, even if cells denature etc etc
As the plant can't make WATER, they have to absorb it from the solution. So if U subtract the mass of water absorb from the mass of radish u get the dry mass.

nid404

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Re: IGCSE Biology Paper 3
« Reply #43 on: June 09, 2009, 06:17:34 am »
Liver cells - Nucleus, Cytoplasm, and cell membrane. I hope.
Yeah, hepatic portal vein and ileum
dry mass, i put measure the amount of solution uptaken by the plants., and then subtract from original. I think its wrong.

yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
But the same radish has to be used for 6 weeks. How would you "bake" it without killing it? Thats what the
experiment says nid. They measure the growth of the plant for 6 weeks. They wont use different plants.

it says in the Hodder Murray revision guide, By the way, so it s gotta be rite. theres no 2 ways about it, to find the dry mass uve gotta bake the organism, even if cells denature etc etc
As the plant can't make WATER, they have to absorb it from the solution. So if U subtract the mass of water absorb from the mass of radish u get the dry mass.

no friends it gives increase in wet mass...not dry mass

Offline annie_angel

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Re: IGCSE Biology Paper 3
« Reply #44 on: June 09, 2009, 06:22:00 am »
well....it actually depends on the examiners mind... :-\
Dont tell God how BIG your storm is...;tell your storm how BIG your GOD is.^_^