Qualification > Sciences
IGCSE Biology Paper 3
annie_angel:
--- Quote from: thukon 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?
--- End quote ---
i got this one rong..i actually got pissed off and i rote a story tht i dnt evn remember!! :D
Mirzaa:
--- Quote from: thukon on June 09, 2009, 05:48:41 am ---
--- Quote from: Mirzaa on June 09, 2009, 05:45:12 am ---
--- Quote from: thukon on June 09, 2009, 05:27:16 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.
--- End quote ---
yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
--- End quote ---
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.
--- End quote ---
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
Friends:
--- Quote from: Mirzaa on June 09, 2009, 06:07:04 am ---
--- Quote from: thukon on June 09, 2009, 05:48:41 am ---
--- Quote from: Mirzaa on June 09, 2009, 05:45:12 am ---
--- Quote from: thukon on June 09, 2009, 05:27:16 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.
--- End quote ---
yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
--- End quote ---
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.
--- End quote ---
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
--- End quote ---
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:
--- Quote from: Friends on June 09, 2009, 06:13:07 am ---
--- Quote from: Mirzaa on June 09, 2009, 06:07:04 am ---
--- Quote from: thukon on June 09, 2009, 05:48:41 am ---
--- Quote from: Mirzaa on June 09, 2009, 05:45:12 am ---
--- Quote from: thukon on June 09, 2009, 05:27:16 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.
--- End quote ---
yea thats wrond dude.... uve gotta bake the radish plant to find the dry mass..!
--- End quote ---
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.
--- End quote ---
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
--- End quote ---
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.
--- End quote ---
no friends it gives increase in wet mass...not dry mass
annie_angel:
well....it actually depends on the examiners mind... :-\
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