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Recent content by pundadesh

  1. P

    A level Biology: Post your doubts here!

    Can someone tell me whether we have to know about the various types of transpiration, e.g. stomatal and cutical transpiration This is because it came out in 9700/21/O/N/12 but I've never come across it in any textbooks Thanks
  2. P

    Physics: Post your doubts here!

    9702/22/M/J/11 Q2(b)(ii) A second raindrop has a radius that is smaller than that given in (a). On Fig 2.1, sketch the variation of speed with time for this second raindrop The sketch is below the original curve Is it because the radius is smaller therefore the mass is smaller as well (since...
  3. P

    Chemistry: Post your doubts here!

    Would CIE accept though?
  4. P

    Chemistry: Post your doubts here!

    Hi guys can I ask if CH3CHClCHClCH3 is the same as CH3CH(Cl)CH(Cl)CH3, cause the mark scheme specifies CH3CH(OH)CH(OH)CH3 for the -OH functional group
  5. P

    A level Biology: Post your doubts here!

    For the question 'how alveoli are adapted for gaseous exchange', The mark scheme also said 'I high SA:V ratio/ increase SA'
  6. P

    A level Biology: Post your doubts here!

    Hi guys, can someone clear my doubt regarding this examiner report comment 'Candidates lost credit by stating that the alveoli have a large surface area to volume ratio' This relates to the question: 'Describe and explain how the structure of the human gas exchange surface is adapted for...
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