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  1. R

    tunica intima should be drawn as 1 line rite not 2 lines like cell wall?

    tunica intima should be drawn as 1 line rite not 2 lines like cell wall?
    • raamish
    • Profile post
  2. R

    Some biology practical doubts

    ok 1 last qs is tunica media of artery greater than that of its tunica externa?
  3. R

    Some biology practical doubts

    and i just wanna tally that: 1)the tunica media of artey is thicker than that of vein ? 2)the tunica externa of vein is thicker than that of artery? 3) do u have the book.Can u upload the pages of lung if u can
  4. R

    and can u tell me how many layers are their in bronchiole. i knw there is epithelium and after...

    and can u tell me how many layers are their in bronchiole. i knw there is epithelium and after that i dont knw how many layers will we have to make in plan drawing and what will they be labelled
    • raamish
    • Profile post
  5. R

    which tunica media is thicker artery compared to a vein and which tunica externa is more thicker

    which tunica media is thicker artery compared to a vein and which tunica externa is more thicker
    • raamish
    • Profile post
  6. R

    Some biology practical doubts

    for example in making 10cm3 of water of conc 0.8 u used 2cm of water and 8cm3 of solution rite?
  7. R

    Some biology practical doubts

    please reply quickly. if u cant post your diagrams(although if u can plzz) then tell me the layers of bronchiole and trachea for e.g. trachea has epithelium then cartilage(i dont know in which layer) . After that i am confused which layers will come. HELPPPP
  8. R

    Some biology practical doubts

    hey saad help me real quick. could u post your plan diagrams of artery and vein and bronchiole and trachea. really cant understand how many layers there will be in them and their labelling?
  9. R

    Some biology practical doubts

    thnx got it. ok in artery and vein which tunica media is thicker and which tunica externa is thicker ? can u also post a link to a a lung?
  10. R

    Some biology practical doubts

    thnx ok how do we differentiate b/w macrophages and neutrophils in microscope
  11. R

    Some biology practical doubts

    http://www.xtremepapers.com/papers/...nd AS Level/Biology (9700)/9700_s11_ms_31.pdf 1b(iii) what is the relationship of absorbance of light here? Also, in diagram of a vein tunica intima should be double layered like the epidermis in plants or should it be a single line? will cell surface...
  12. R

    A level Biology: Post your doubts here!

    http://www.xtremepapers.com/papers/...nd AS Level/Biology (9700)/9700_s11_ms_31.pdf 1b(iii) what is the relationship of absorbance of light here? Also, in diagram of a vein tunica intima should be double layered like the epidermis in plants or should it be a single line? will cell surface...
  13. R

    Chemistry: Post your doubts here!

    j09 1d(ii) http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w09_qp_21.pdf 3a(iii) 3c http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w09_qp_22.pdf 3 Please help me out not much time left for me
  14. R

    Chemistry: Post your doubts here!

    One more question when we will do a complete combustion of N2 will N2+o2->NO be formed and then NO will oxidise with NO2 or will NO2 be formed directly from first reaction: N2+O2->NO2
  15. R

    AS Chemistry P2 Prep.

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w06_qp_2.pdf http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w06_ms_2.pdf In 4g) my answer is...
  16. R

    Chemistry: Post your doubts here!

    When they ask u to calculate the regular enthalpy change without using bond energies use this formula: AH of products- AH of reactants. And when they ask u to take enthalpy change out by using the bond energies then u use this formula= AH of Bond breaking( reactants) - AH of bond making (products)
  17. R

    Chemistry: Post your doubts here!

    http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s09_qp_2.pdf In 1d(ii) its asking the moles of the atoms so why arent the moles calculated like this: mass/Avogadro's constant ???
  18. R

    Chemistry: Post your doubts here!

    Shouldn't So2 form double bonds with both the oxygen molecules so that both the oxygen and S get stable. Why does it form one double bond with one oxygen and a single bond with the other oxygen??
  19. R

    Chemistry: Post your doubts here!

    PLease answer this question why does cis-trans isomerism arise in a molecule?
  20. R

    Chemistry: Post your doubts here!

    Hey guys please somebody help me. I dont know how to draw 3d structures of hydrocarbons help
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