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  1. A

    Hi! could you please delete my account? :)

    Hi! could you please delete my account? :)
  2. A

    biology paper 1 doubts

    i think d is the answer coz in the root higher pressure for water to move up to xylem.
  3. A

    NEED URGENT HELP!!

    try other teachers then. good luck bro. :)
  4. A

    biology paper 1 doubts

    adenine forms 2 bonds with thymine and guanine 3 bonds with cytosine
  5. A

    biology paper 1 doubts

    it is the formula of dissacharide. check ur notes. it is the same for all dissacharides.
  6. A

    biology paper 1 doubts

    I think B is the answer. 80 eyepiece division(eyepiece graticule)=0.2 mm 4 epd(chloroplast width)=0.01mm 1 mm=1000 um 0.01 mm= 10um
  7. A

    biology paper 1 doubts

    endodermis is found in t.s root. epidermis is found in lower and upper epidermis in t.s leaf and t.s stem. epithelium is found in cilia. and endothelium is squamous epithelium that is one cell thick
  8. A

    biology paper 1 doubts

    Reducing sugar test non reducing sugar test -ve +ve non reducing sugar present +ve +ve non reducing sugar absent +ve +ve (higher intensity...
  9. A

    A level Biology: Post your doubts here!

    Cell wall is fully permeable. however pressure generates as a result of presence of cell wall. if there is no cell wall. no turgor pressure
  10. A

    NEED URGENT HELP!!

    tell them that if he can let u study in the present batch. u can catch up the remaining chapters by yourself. you wil get frnds also. they can help you. but you wil have to work by urself. or simply there lots of notes in the net. and here with xtreme you wil hav no problm. we all wil help u
  11. A

    M/J 2013

    hello im taking part in CIE M/J 2013. im taking maths biology chemistry and physics.
  12. A

    biology paper 1 doubts

    For number 17 i think C is the answer. Because it said increase in size. it has not mentioned increase in size of what.
  13. A

    biology paper 1 doubts

    only hydrogen bonds between complementary base pairs and covalent bonding for the phosphoester linkage.
  14. A

    biology paper 1 doubts

    Actually less negative refers to a higher water potential. And more negative to a lower water potential as it contains more solutes. Adding to solutes to pure water lowers the water potential.
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