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again all da imunity crap...its easier 2 get da plasmodium from a mosquito??????????
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again all da imunity crap...its easier 2 get da plasmodium from a mosquito??????????
well wen we ll be forcing out air...hw i mean.....will not the soln go out....i am nt getting ithere they just want to know the rate of photosynthesis ...higher rate means more volume of O2 and the leaf will rise up faster as it experiences upthrust force due to more volume of O2...so they showed the method how to take leaf discs from both types of leaves...they took a syringe, removed the plunger, placed the finger over the open end of the syringe, pored the NaHCO3 solution and then 6 leaf dics in the solution,...now they put the plunger back, put the syringe upside down , means the needle part up...then pushed the plunger upword till all the air comes out, den placed the finger on top of the needle part and pulled the plunger to creat a vaccum, tapped the side of the syringe to remove all the air bubble,till the leaf discs sunk to the bottom- means therez no gas around the disc..as soosn as the disc sink start the timing till it rises up...this time gives us the rate of O2 production during photo..the higher the rate the faster it will rise up and the lesser time it will take...
becouse u have to measure the rate of movement of water in the capillary...indirectly the rate of transpiration in the same light intensity throughout the experiment...so if already both type of leavs have some vriable amount of water , will u be able to measure the rate of tranpiration correctly..that the movent of water in the capillary...?http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s10_qp_52.pdf
q1 now why we want dry leaves here b4 measuring transpiration rate
no u r not applying large force, u r pushing the piston slowly to make sure just the air should come out not the solution...ok even if little solution comes out it doesnt matter unless u r goin to use the same volume for the next exp.well wen we ll be forcing out air...hw i mean.....will not the soln go out....i am nt getting it
they said that all the volumes/conc. should be constant...means even the volume of the 10 samples out of which 5 u r taking to count the cell no.http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s10_qp_52.pdf
question 2 angelgirl:) wh ms does not mentions that volume of 5 cell samples taken from each culture shud also be constant............dont u thnk dats a good enuf control variable.....i dont knw why examiners thinkinng is quite different from myn
temp..doesnt affect the light dependent stage...but at high temp..the enzymes get denatured...http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w09_qp_51.pdf
Q1..could someone plz explain the graph. i dont get it.
ok thanks. what abt light independent? is it affected by temp?temp..doesnt affect the light dependent stage...but at high temp..the enzymes get denatured...
light independent stage is dependent on light dependent stage...so ofcourse it will be affected by temp...ok thanks. what abt light independent? is it affected by temp?
light independant also involes enzymes..........ok thanks. what abt light independent? is it affected by temp?
yeah =(light independant also involes enzymes..........
hey people dont u feel that bio p5 is difficult and its gt is also higher...........in every paper.........
no that is not dependant.....we can not use colorimetre here as we can not seperate the cells.......dependant var is the concentration of the dye.
although they havent marked it in the ms but i guess i wud be that.n we can measure by the colorimeter
may be then it is volumeno that is not dependant.....we can not use colorimetre here as we can not seperate the cells.......
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