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  1. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    No but it says that at very start. Wont iodine b brown wen we have just added it or it quickly turns blue black?
  2. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Biology%20(5090)/5090_w08_qp_6.pdf Can someone just have a look at this papers question no.2 -ii) n tell me colour of starch in A-2 i think it will be brown but mark scheme says it is blue-black. Cancsomeone explain me why...
  3. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Could you please solve it for me, my answers dont resemble to mark scheme
  4. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Biology%20(5090)/5090_s08_qp_6.pdf please someone tell me how to calculate surface area of given cubes in question no.1 part a.
  5. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Is it always necessary to use iodine when preparing slide???
  6. chocolate_girl

    InshaAllah :)

    InshaAllah :)
  7. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Prepare slide by putting on its centre whatever is to b observed. Cover carefully with coverslip at an angle to avoid air bubbles. Put on microscope stage and adjust clips to fix it in position. Examine first under low power then under high power. Describe your observation( you may draw a...
  8. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Oh alryt. Do we use water like on slide to stick nythng on it better?
  9. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    No like when we use it for slide, dont we??
  10. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Is it always important to use a few drops of iodine when preparing a slide to view under microscope??
  11. chocolate_girl

    Lets everyone play for eachother

    Lets everyone play for eachother
  12. chocolate_girl

    Ur welcome :)

    Ur welcome :)
  13. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20O%20Level/Chemistry%20(5070)/5070_s09_qp_4.pdf Someone please tell me the answer for question 2 part b-ii) with explanation.
  14. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    When water leaves out of a plant cell, it is called exosmosis (tip to remember:exit from ex) when the plant cells are kept in a region of low water potential the water in them leaves by osmosis called exosmosis. The cell becomes flaccid. We say that it has plasmolysed.
  15. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Can someone please post the best atp notes for phy chem n bio. Like last minute revision brief notes.
  16. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Thankyou and can u also explain me the topic surface area to volume ratio pleasee
  17. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Pleasee help me with this :(
  18. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Also another problem is in the topic surface area to volume ratio in cells. This thing doesnt get into my head so someone please precisely explain the topic to me :)
  19. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Can someone tell me the mechanism of curling of stem in bio chap osmosis. I dont understand it at all that y it curls and when it curls inward and outwards like in different concentrations. Please help :)
  20. chocolate_girl

    Biology; Chemistry; Physics: Post your doubts here!

    Thats really sweet of u :)
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