D4.2 Stability and change

D4.2 Stability and change Quiz

IB Biology SL: Quiz

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  1. 1. A forest shrank from 500 km² to 400 km². What is the percentage change?

    • A. −25%
    • B. −20%
    • C. +20%
    • D. −80%

  2. 2. Which is NOT a requirement for ecosystem stability?

    • A. Energy supply
    • B. Nutrient recycling
    • C. Genetic diversity
    • D. Constant harvesting

  3. 3. In eutrophication, oxygen levels fall mainly because:

    • A. Algae respire at night only
    • B. Bacteria decompose dead algae
    • C. Nitrate reacts with oxygen
    • D. Fish use it up

  4. 4. Which organism would have the highest DDT concentration?

    • A. Phytoplankton
    • B. Zooplankton
    • C. Small fish
    • D. Fish-eating eagle

  5. 5. Hinewai Reserve is an example of:

    • A. Eutrophication
    • B. Rewilding
    • C. Biomagnification
    • D. Unsustainable harvesting

Quiz