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  1. X

    CASPARIAN STRIP BIO ???????????

    - casparian strips are found in the endodermis of the plant's root - it is impermeable to water - blocks the apoplast pathway - water therefore can only pass through the endodermis through the passage cells by the symplast pathway - it allows the cells to select what organic ions pass into the...
  2. X

    Bio - MCQ's Help Plz!!!

    alveolus is one cell thick. to pass through a cell, you have yo go through the cell surface membrane TWICE. * think! right?! * so alveolus -2 blood capillary - 2 then red blood cell -1
  3. X

    Physics MCQs thread.

  4. X

    Biology MCQ thread..!!

    1. it only takes 1 change in the nucleotide sequence to form the sickle cell. - sickle is different from the normal red cells by 1 amino acid. - 3 nucleotides codes for 1 amino acid - but 1 change in the nucleotide sequence is enough to change the amino acid. 2. A. is wrong, who told you...
  5. X

    Biology MCQ thread..!!

    5?
  6. X

    Physics MCQs thread.

    hey, about Q13. there is always a way to adjust the forces to make it zero unless they are equal.
  7. X

    Physics MCQs thread.

    E = I ( R + r ) 12 = I (1 +3 ) I = 3A rate of energy = power P = I^2R P = 3^2 x 3 P = 27W
  8. X

    Physics MCQs thread.

    ans : B?
  9. X

    Physics MCQs thread.

    really? i seriously haven heard of it.
  10. X

    Physics MCQs thread.

    no it's not, it's D
  11. X

    Physics MCQs thread.

  12. X

    Physics MCQs thread.

    why?
  13. X

    Physics MCQs thread.

    a molecule of mass m travelling horizontally with the velocity u hits a vertical wall at right angles to the wall. it then rebounds horizontally with the same speed. what it is the change in momentum? a. zero b. mu c. -mu d. -2mu
  14. X

    Physics MCQs thread.

    m/j 04 q9
  15. X

    Physics MCQs thread.

    WHERE CAN I FIND THE MARKING SCHEMES OF PAPER 1 2001 AND 2002?
  16. X

    Physics MCQs thread.

    yes
  17. X

    Physics MCQs thread.

    M/J 07 Q23 ?
  18. X

    Physics MCQs thread.

    that is exactly what i am asking except i got A.
  19. X

    Physics MCQs thread.

    the answer is D
  20. X

    Physics MCQs thread.

    guys, M/J 09 Q20 pls
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