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  1. N

    Biology MCQ thread..!!

    The leaf in diagram 1 is rolled up, showing that it has lost water by osmosis becoming flaccid. hence the solutionin 1 is more concentrated and the solution in 2 is dilute (less negative water potential of Y). the leaf in 2 gains water by osmosis and hence it's water potential is also higher...
  2. N

    Help in BIOLOGY ...please!

    THESE ARE THE VARIOUS REASONS FOR THE PREVALANCE OF CHOLERA. people in many parts of the world have no acess to clean chlorinated water. ther eis a lack of health awareness reagarding proper hygiene. people suffer frm protein malnutrition and cannot synthesise antibodies. ORS is not available...
  3. N

    chem p12...hmm that was a tough one !!!

    The paper was quite easy. apart from two or three tricky questions, most of them were quite understandable. not too bad overall. :)
  4. N

    How To prepare for Physics P 2 ???

    yup! ur absolutely rite.
  5. N

    Any new about AS Bio 21?

    RELAX. you'l only make your condition worse by getting tense. take it easy!! 8)
  6. N

    How was Biology Paper 22

    i just hope paper 1 turns out to be as easy as this
  7. N

    Any new about AS Bio 21?

    There was no question on transport in plants in my varient
  8. N

    How was Biology Paper 22

    I spent a lot of time practising past papers and it turned out to be of very little use!!! But i guess i cant complain as long as its good
  9. N

    How was Biology Paper 22

    Hey, how was the paper. it was a little out of the ordinary but more or less easy :)
  10. N

    Any new about AS Bio 21?

    I just gave p22. It was quite easy. all the other varients should be of the same scale.
  11. N

    Urgent Help For Biology Plz Help Me!!!!

    water is a solvent and hence a medium for metabolic reactions and is also a transport medium. water has high specefic heat capacity and thus provides stable environment for organisms I am sorry. there is too much info. i cant state it all here. you have to read the book.
  12. N

    Urgent Help For Biology Plz Help Me!!!!

    prokaryote: smaller ribosomes. no nucleus no membrane bound organelle. no CELLULOSE cell wal have mesosomes and slime capsule Plant cell have cell wall animals dont anmal cells have centrioles plants dont plant cells have large central vacuole. animals have small ones. plant cells have...
  13. N

    ~AS Bio doubts Here !!~

    an exact copy of dna is essential as errors may cause the cell to loose its function and become unsuited for its job. the cell may also get mutated. mutated cells are rejected by the immune system. these are the points given in the mark scheme.
  14. N

    Bio notes needed!!!! Infectious disease

    PLz read the mark schemes of 2010. Paper 21 22 and 23. they contain almost everything you need to know about infectious diseases.
  15. N

    ~AS Bio doubts Here !!~

    Yes. 100% sure . it was written in the mark scheme. i was a bit surprised myself.
  16. N

    role of decomposers in nitrogen cycle and carbon cycle..?

    Re: role of decomposers in nitrogen cycle and carbon cycle.. oh yeah. i forgot that little bit of detail.
  17. N

    Phy paper33

    I got a gradient of 6.71 and intercept of -0.35. a lot of my friends got -ve intercepts. many of them got gradients above 7 and 8.
  18. N

    ~AS Bio doubts Here !!~

    1. constant region binds to receptors on phagocytes and helps phagocytosis. 2. Sorry! I have never heard of these terms 3. smooth muscle controls the diameter of a particular tube ( blood vessel or trachea or whatever) 4. continuous flow of a solution with no breaks in their stream. 5. Base...
  19. N

    role of decomposers in nitrogen cycle and carbon cycle..?

    Re: role of decomposers in nitrogen cycle and carbon cycle.. Yes they are bacteria named nitrosomonas, nitrobacter and rhizobium. nitrosomonas and nitrobacter are nitrifying bacteria converting ammonium ions to nitrites and subsequently nitrates. rhizobium converts atmospheric nitrigen to...
  20. N

    Physics Practical/33 Info confirmation required

    Thnx very much for the tips on moments!
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