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  • 17 May 2024
    Amy Goodyear
    Equipment for IB Biology
    are the prescribed labs still mentioned/referenced in the tests, even though they are not prescribed?
  • Dear Richard, thank you for your reply and the clarification. It helps a lot!
  • FrancescaThank you for pointing this out. There are some, I believe marine, inverted pyramids of biomass.I will ask David to edit the question to:Which of the following normally decrease at the stage in the food chain from producer to primary...
  • Hi, in question number 3 biomass does not necessarily decrease since in some aquatic system it increses. I am confused, Can you explain? Thank you