Biology Forum Community General Discussion PLEASE HELP!!!

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    • #7041
      ConfusedKid
      Participant

      Hi every one.

      Im @ skool, doing triple award science ( 3 science GCSE’s) and I need help on some biology stuff. What I need to know is about diffusion.

      I need to know… How concentration gradient is matained in the a) lungs b) small intestine c) placenta and d) leaf.

      Please help as soon as possible… Thanks

      Aimee

    • #69482
      mith
      Participant

      Textbook? If you don’t have one buy one and read it.

    • #69483
      ConfusedKid
      Participant

      I have but it doesnt answer my question… and there is nothing about it online either!

    • #69487
      mith
      Participant

      Well if you search concentration gradient and those 4 terms it wouldn’t help much, you need to be more specific. Figure out what substance is involved in the concentration gradient(might be more than 1). Look on wikipedia.com for those 4 tissues, figure out their function and what substance needs to be diffused.

    • #69515
      ConfusedKid
      Participant

      thanks mith you helped alot!!

      thank you

      😆

    • #69620
      ConfusedKid
      Participant

      OkiDoki…. ive got ANOTHER 🙄 biology exam on monday and its all about population,evolution, adaption endangered species etc… has ne1 got ne tips or nefin that mite help? also.. there are apparently alot of question about whales?? dont know why.. but anyway.. any tips will be appreciated.. thanks 😀

    • #69623
      mith
      Participant

      whales are an example of evolution 😀

    • #69624
      AstusAleator
      Participant

      If you browse through the evolution and ecology forums, you might find some useful info. Also, check out the tutorials from this site.

    • #69685
      ConfusedKid
      Participant

      Thanks guys i’ll try that

    • #70008
      blabajubajoo
      Participant

      Books are usually really good has anyone heard of a library ar are we all computer geeks

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