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Recent content by osama ahmed ibrahim

  1. O

    are u taking ESL this year

    are u taking ESL this year
  2. O

    Mathematics: Post your doubts here!

    thanks but c also lies on the line parellel to AB through 3,11 what should i understand from this
  3. O

    Mathematics: Post your doubts here!

    LASTLY n V i cant understand why he chose positive value when finding inverse
  4. O

    Mathematics: Post your doubts here!

    what does it mean when q said (c also lies on the line parellel to AB through 3,11 i cant understand what is happening below red line
  5. O

    Mathematics: Post your doubts here!

    HELP ME TO DO II AND III HELP WHY DID HE SUBTRACT 10 FROM 20
  6. O

    Mathematics: Post your doubts here!

    i find diffuclulty to asnwer this trigonometry question can anyone help help me in III
  7. O

    A level Biology: Post your doubts here!

    november 2014 p42 last q in secton a
  8. O

    A level Biology: Post your doubts here!

    u are missing many ms points like u didnt discuss that target cells of insulin are muscle liver and adipose cells
  9. O

    A level Biology: Post your doubts here!

    cie 9700 paper 4
  10. O

    A level Biology: Post your doubts here!

    help i didnt understand
  11. O

    A level Biology: Post your doubts here!

    The optimum pH for the activity of rubisco is pH8. Explain why the illumination of chloroplasts leads to optimum pH conditions for rubisco. excited electrons leave, chlorophyll a / photosystem ; 2 pass along ETC ; 3 protons present from photolysis ; 4 protons (pumped) into intermembrane space ...
  12. O

    A level Biology: Post your doubts here!

    Suggest how the stocks of Atlantic cod may be increased. stop / reduce, fishing ; A correct ref. to quotas / moratorium 2. ref. to size of nets ; 3. ref. to methods of fishing ; 4. control pollution ; 5. education ; 6. captive breeding and release / restocking from fish farms ; 7. ref. to marine...
  13. O

    A level Biology: Post your doubts here!

    Coelacanth haemoglobin has a very high affinity for oxygen, suggesting that coelacanths, which have been captured at depths of between 200 m and 400 m, live in water that has a low concentration of oxygen. Explain how an environmental factor, such as the low concentration of oxygen in deep...
  14. O

    A level Biology: Post your doubts here!

    no notes for them in book do u have notes
  15. O

    A level Biology: Post your doubts here!

    genetic screening and dna sequencing is on syllabus?
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