The nature of ecosystems and sampling

The nature of ecosystems and sampling Quiz

Spec 10.1 · Edexcel A-Level Biology B: Quiz

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  1. 1. A student marks 30 beetles, releases them, and later catches 50 of which 10 are marked. What is the estimated population?

    • A. 150
    • B. 60
    • C. 300
    • D. 1500

  2. 2. Which method best shows how species change from the sea up a rocky shore?

    • A. Random quadrats
    • B. Mark-release-recapture
    • C. A belt transect
    • D. A pyramid of numbers

  3. 3. A calculated t value is 2.50 and the critical value is 2.10. What follows?

    • A. Accept the null hypothesis
    • B. The data are not normally distributed
    • C. There is a correlation
    • D. Reject the null hypothesis; the difference is significant

  4. 4. Which pyramid cannot be inverted?

    • A. Numbers
    • B. Energy
    • C. Dry biomass
    • D. Fresh biomass

  5. 5. What does a Spearman coefficient of −0.90, with a critical value of 0.65, show?

    • A. No significant correlation
    • B. A significant negative correlation
    • C. A significant positive correlation
    • D. A significant difference between two means

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