how much do u know about A-level biology

by: mcrmcrmcrmcrmcr
  1. 1

    which one of these is not a DNA base

  2. 2

    people with the sickle trait cannot get......

  3. 3

    a totipotent cell can....

  4. 4

    a mis-sense mutation is

  5. 5

    what is negative feedback?

  6. 6

    the hormonal system

  7. 7

    the nervous system

  8. 8

    a earthworm moves away from ligt what is this behavoir called

  9. 9

    complete this stimulis--> receptor-->

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