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  1. H

    role of rhizobium...

    question....describe role rhizobium in root nodule.....3 marks.... well question is simple one.....but i cn only think of the following rhizobium fixes atmospheric nitrogen to NH4+ which can later be converted to nitrates to manufacture amino acids..... this is only 1 point ..how can i get full...
  2. H

    oct/nov 2010 phy paper 22

    β-particles have a range of energies β-particles deviated by (orbital) electrons β-particle has (very) small mass ms lists these points for reasons that beta particles are not used for scattering experiment.......so i just wanted to know whether my interpretations for these points are...
  3. H

    oct/nov 2010 phy paper 22

    http://www.xtremepapers.net/CIE/Interna ... _qp_22.pdf 2(b) can anyone draw it and post attachment here....want to see whether i have done correct
  4. H

    Chemistry 2006

    ooohhhhh i c...was making a silly error
  5. H

    graticule....

    hamid ....do u know abt role of endodermis in generation of root pressure
  6. H

    AS PHYSICS!!!

    and usman......do chek this...i told u b4
  7. H

    AS PHYSICS!!!

    yea i got the asame anser.....thts okay
  8. H

    Physics Paper 2

    question 6 c....see the distance marked 32.4cm is the inter-nodal distance....u halve it to get distance b/w adj node and antinode..... fig6.1 show antinode-node distance which shud get 16.2 cm by halving suggesting that a.n is .5 cm up from the mout of tube......i hope that clarifies the things
  9. H

    Physics Paper 2

    well msk.....when power supply is connected it will damage other bulbs or blow out fuse or melt wire etc....b/c it ll cause a very large current to flow which will flaw if resistance is very low...so if A is not shorted than connecting with power supply will not cause damage cos it has 15 ohm...
  10. H

    help bio

    nibz there was an examiner report referring the flow of water through xylem as appoplast......is it true
  11. H

    Chemistry 2006

    i think m missing sumthing in this question plz help me out
  12. H

    Chemistry 2006

    so4 (2 minus)so now work out
  13. H

    Chemistry 2006

    i m assumin its paper 11....in so2 oxidation state is +4......it ll be oxidised to so4(2-) in which oxidation state is +6
  14. H

    graticule....

    hmm u mean rotating eyepice just rotates that graticule scale making the job easier ........thanks.....
  15. H

    graticule....

    i hav used it hardly three times......so just wanted to know that when using it how we are positioning it onto the part of slide which we wanna measure...are we moving the slide left-right or rotating eye-piece ...plxx clear me this doubt....and any other tip when using it
  16. H

    help bio

    but with appoplast pathway we must not mention osmosis
  17. H

    Pure Math 1 October/November 2009

    yeah no problem i guesss
  18. H

    help bio

    Explain, using the term water potential, how water moves from the vascular tissue to the atmosphere. ....need an exam-style anser ...just to asses what are the points i leave out....
  19. H

    help bio

    explain why pressure in left ventricle falls to zero but that in arteries doeSNt fall below 10 KPa
  20. H

    Chemistry 2006

    ammonia has H-bonds ....molecular mass just gives us an indication of magnitude of vdw forces
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