How was Bio pp3

[Xam]

So guys how did it went?? mine was pretty good yar... except a lil here n there mistakes!!
q1 was easy but in ques 2, i couldnt make a plan diagram properly cuz it was a root cell.. n there werent any vascular bundles in K1

 

[InesF]

Well, I thought it was not difficult at all. Question 1 was a bit different from the previous papers, still it was easy. Question 2 was a pain, probably because I hate plants!!! But overall it was quite an easy paper. What differences did you notice between the slide and the image?

 

[InesF]

Ah, and i believe there was vascular bundle in the slide. Yes, it was a root hair cell. but root hair cells have the vascular bundle located in the stele. The xylemn in the centre and the phloem sorrounding the xylem.

 

[Niidz]

Was this paper unexpectedly SHORT ? Or was it just me ? Cuz I was thoroughly done with solving and several rechecks like 20 minutes early ! I hope that's good .

During solving I thought it was kinda confusing, but later thinking about it, it was actually pretty easy Just a bit different.

The Permeability for Question 1 increased with increase in cuso4 conc, right ?
And what was the variable we had to control? The tubers' length or what?

For Question 2, I didn't really understand what the Question before the last was asking for. Was it percentage of Ca ions in xylem to "" phloem? Like 85/190 x 100 ?
Or was it like 85/(190+85) x 100 = 40% and 190/(85+190) x 100 = 60% Then 60% - 40% = 20% ?? ( I'm not sure of the numbers, though. )
Also for the High-Power drawing of the xylem and layer surrounding its quarter, could the circle representing xylem be a single-line? Cuz looking closely in the microscope, a double-line was clearly not present :S

Thanks to whoever is kind enough to respond.

 

[Salimsaid89]

Guys guys...you should have seen paper 34...it was horrible!!!unfortunately it was the paper i did...never seen a practical like that before...it was complicated!

 

[JK_1995_15]

what improvements and sources of error did u put on

 

[soumayya]

the paper was kinda shorter than usual...i had to repeat my expt..koz i forgot to wash the samples after cutting...still, i got tym to revise...i saw a thick line for the xylem...so i drew double line...

 

[InesF]

yeah, i agree, the paper was really short. but so was last years. I really don't get it, why are we so short on time for chemistry and have so much spare time for biology?

anyways, Niidz, i also came to that conclusion, the permeability increased as the conc of copper sulphate increased.
i think the variable we had to control was the length. Pretty sure about it.
for the second question, the part about the percentage difference I did 85/190 x 100. but all of my friends did it differently. no one got the same answer, soo... not sure!
for the plan diagram of the high power xylem, i did a single line for the xylem vessel and a double line for the sorrounding cells. what do you think?

 

[Sweet_angel]

YEAH the paper was quite gud and simple...........
i mean it was quite different frm other past papers bt was easy.......
n it was short too.....
and for the variable to control even i wrote that it was length..........
and ya as the concentration increases the permeability also increases...........
and in the percentage thing i got 40% ( not sure about it ) as everyone has got different different ans.
i did 85/190 x 100.............




i wish thats the correct ans.......
n hope that the other two papers are also easy like this one...............










ALL THE BEST.............to everyone.....

 

[skyfox]

the percentage difference that i got is about 55%. Most of my friends had the same answer like me.

 

[soumayya]

the percentage difference that i got is about 55%. Most of my friends had the same answer like me.

i also got this answer..

 

[samy]

i also got 55% ..

cox the formulae for finding percentage diff is difference/original value..
thus, it becumx 190 - 85 / 190 = 55%

 

[samy]

oh n yea multiplyin it wid 100!

 

[pioneer]

percentage was 55 percent...overall my practical went pretty bad..:S...which variable was to be kept constant surface area or length?????

 

[soumayya]

i had put surface area and since the cross sectional area was the same, the length should be the same...i actually included both...