CAIE A Level Biology 9700 · Classification, biodiversity and conservation
A marine biologist calculated Simpson's index of diversity (D) for two coastal habitats: a pristine coral reef (D = 0.95) and a polluted estuary (D = 0.28).
Outline what these two different values of D indicate about the biodiversity of the two habitats.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.